avcs user guide v3 1

User Guide Including the ADMIRALTY Information Overlay

S-63 Edition 1.1

Version 3.1

JRC User Guide V1.0

AVCS User Guide V3.1 2

Electronic Navigational Charts (ENCs) 3

Before You Start 3

ECDIS Containing Existing ENCs 3

Step 1: Install the Public Key 4

Step 2: Install Permits 4

Step 3: Install AVCS ENCs 4

Step 4: Update AVCS 4

Step 5: Install the ADMIRALTY Information Overlay 5

Step 6: Maintain your Holdings 5

2.1 Introduction 7

2.2 AVCS Overview 7

2.3 Quality 7

2.4 Carriage Compliant 7

2.5 Electronic Navigational Charts 7

2.6 Licensing 7

3.1 General 8

3.2 Media formats for AVCS 8

3.3 New AVCS Customers 8

3.4 The AVCS Licence 9

3.5 The Schedule A 9

3.6 Data Cleansing 10

3.7 Public Key 10

4.1 New ENC Permits 12

4.2 Updating 12

4.3 Base Discs 12

4.4 README.TXT File 12

4.5 Cancelled ENCs 13

4.6 Adding Chart Coverage 13

6.1 Important Information for Users 15

7.1 Common Error Codes 16

7.2 Decryption Failure 16

7.3 Conversion Errors 16

8.1 Technical Support 18

8.2 Feedback 19

UKHO 2013 All Rights Reserved

The copyright in this document, which contains information of a proprietary nature, is vested in UKHO.

The content of this document may not be used for purposes other than that for which it has been supplied

and may not be reproduced, either wholly or in part, in any way whatsoever.

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This Quick Start guide is designed to help you to load and maintain your ADMIRALTY Vector Chart Service (AVCS)

data easily and quickly. It describes the basic steps necessary to use AVCS in any ECDIS. However the functionality

for loading and maintaining AVCS will differ from one ECDIS to another and this guide should be used in conjunction

with the User Manual supplied by your ECDIS manufacturer.

For a more detailed guide to AVCS installation and troubleshooting information, refer to sections 2 8 of this

document and the User Manual supplied by the manufacturer of your ECDIS.

Electronic Navigational Charts (ENCs) AVCS is comprised entirely of Electronic Navigational Charts (ENCs) issued by Government Hydrographic Offices. It

is designed to be used in conjunction with a type approved ECDIS to provide a primary navigation tool that meets the

requirements of SOLAS Chapter V.

Before You Start When subscribing to AVCS for the first time your ADMIRALTY Chart Agent will provide the following materials:

CD Users

> AVCS User Guide including the Quick Start Guide (this document)

> AVCS Base Discs (a set of Base CDs)

> AVCS Update Disc

> ADMIRALTY Information Overlay (AIO) CD (if you have a compatible display system and the Overlay has been

added to your licence)

> End-User Licence Agreement for digital data services

DVD Users


> AVCS DVD (containing both base ENCs and updates)

> ADMIRALTY Information Overlay (AIO) CD (if you have a compatible display system and the Overlay has been

added to your licence)

> End-User Licence Agreement for digital data services

All users

An e-mail or hard media containing:

> Schedule A (a PDF document listing the Folios and Units that you have licensed, not required if you are using

ADMIRALTY e-Navigator Planning Station)

> A set of ENC Permit files (PERMIT.TXT and ENC.PMT) for each ECDIS equipment

> AVCS Certificate (a PDF or printed document showing your vessel and licence details)

ECDIS Containing Existing ENCs If ENCs are already installed on the ECDIS it is strongly recommended that these are removed from the system

database to avoid any conflicts. If the option is available it is also recommended that users should remove any

installed permits. Please see your ECDIS User Manual for more information.

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Step 1: Install the Public Key In order to load ENCs from AVCS onto an ECDIS the correct public key must be installed. For AVCS ENCs

authenticated using the S-63 1.1 standard the IHO Public Key must be used and the user should check that the IHO

Public Key is installed on the ECDIS.

New ECDIS are supplied with the IHO Public Key pre-installed. However users transferring from another service

may find that the system is using the PRIMAR Public Key. In this case the IHO Public Key must be installed before

AVCS ENCs can be loaded.

The IHO Public Key is contained in the root folder on any AVCS S-63 1.1 Media, or is available to download by

following this link: http://www.iho.int/iho_pubs/standard/S-63/S-63_SA_Certificate.htm

The procedure for installing the Public Key is different on each ECDIS and will be detailed in your ECDIS User

Manual. Specific instructions for some common models of ECDIS are available by following this link:

http://www.ukho.gov.uk/AVCS

Step 2: Install Permits Before loading AVCS ENCs, the ENC Permits must be installed on the system. The permits are supplied by your

ADMIRALTY Chart Agent and consist of 2 files for each ECDIS:

> PERMIT.TXT

> ENC.PMT

AVCS customers with multiple ECDIS on board should be careful to load the correct permits into the corresponding

system.

Failure to install the correct permit will result in an error being reported similar to the following:

> CRC failure permit could not be read

> Failure to uncompress ENC data file

> Decryption failed

Step 3: Install AVCS ENCs The AVCS data is supplied on CD or DVD. Each Base CD contains ENCs from one or more producer nations

(countries) and is labelled with the country names. The DVD contains worldwide ENCs and all available updates.

Note that some countries (such as the United Kingdom) produce data worldwide so the Base discs do not directly

correspond to a geographical area.

It is only necessary to load the discs that contain licensed ENCs, as listed in the Schedule A or e-Navigator Planning

Station. The ECDIS will manage the installation of all ENC cells based on the installed ENC Permits.

Customers should be aware that, depending on the manufacturer, ECDIS manage the import of ENCs differently.

Step 4: Update AVCS Updates to the ENCs in AVCS are available free of charge online and on disc.

Updates can be downloaded online using e-Navigator Planning Station (which is an integrated catalogue, holdings

management, ordering and updating system) or using the stand-alone AVCS Online Updating Service. Contact your

ADMIRALTY Chart Agent for access to e-Navigator Planning Station or download the Online Updating software from

www.ukho.gov.uk/AVCS.

All base ENCs and updates are contained on the AVCS DVD and this is issued every week. In order to update the

ECDIS only the latest AVCS DVD held should be used and run as an update.

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Base CDs contain all base charts and updates valid at the time of issue. Subsequent chart editions and updates are

contained on the latest Update CD. Both Base CDs and Update CD are labelled with the week number of the data

that they contain.

Depending on your ECDIS, you now need to load the updates from the Base CDs and the Update CD, or just from

the Update CD.

Step 5: Install the ADMIRALTY Information Overlay The ADMIRALTY Information Overlay (AIO) is a digital dataset that is designed to be displayed over ENCs in ECDIS

and other chart display systems to provide additional information to the navigator. The Overlay contains all

ADMIRALTY Temporary & Preliminary Notices to Mariners (T&P NMs) and ENC Preliminary Notices to Mariners (EP

NMs), which highlight navigationally significant differences between ENCs and ADNIRALTY paper charts.

The Overlay can be displayed on compatible ECDIS equipment and also in ADMIRALTY e-Navigator Planning

Station. Please see the UKHO website at www.ukho.gov.uk/AVCS for an up to date list of compatible equipment, or

consult your ECDIS supplier.

The Overlay data is held on a single CD and is installed and updated in the same way as ENCs. Please notify your

ADMIRALTY Chart Agent if you wish to use the Overlay on any compatible ECDIS so that the Overlay permit can be

added to the ENC Permit files for that equipment.

The Overlay permit will be loaded at the same time as the ENC Permits in Step 2. Follow Steps 3 and 4 to install the

ADMIRALTY Information Overlay CD.

Step 6: Maintain your Holdings Your ADMIRALTY Chart Agent will supply you with updates to your AVCS data weekly.

For customers using the AVCS DVD all base charts and updates are contained on the DVD and this is issued every

week. In order to update the ECDIS only the latest AVCS DVD held should be installed.

For customers using the AVCS CD each weekly Update CD is cumulative and only the most recent disc should be

installed.

The AIO CD is cumulative and only the most recent disc should be installed.

A new set of ENC Permits will also be supplied by your ADMIRALTY Chart Agent whenever an ENC has a new

edition or you are entitled to access additional ENCs. The new permits relate directly to the discs of the same week

number. The permits may be received from your ADMIRALTY Chart Agent by e-mail or on hard media.

The ENC Permits may be received before you have received the relevant Update discs. It is recommended that you

should not install new permits unless they are accompanied by the appropriate DVD or CDs. The permits will be

accompanied by a Schedule A that identifies the week number for which the permits are valid. Failure to use the

correct set of permits with an Update CD may result in an error being reported similar to the following:

> There is no valid permit for this version of the cell/chart

> Edition number is not valid

> Permit is for an older version of the cell/chart

ENC updates are also available by email and over the Internet through ADMIRALTY e-Navigator Planning Station or

the AVCS Online Updating Service. AIO updates are also available through e-Navigator.

If new ENC Permits have been received, they should be loaded in to the ECDIS before the DVD or Update CD is

loaded.

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Periodically the AVCS Base CDs are re-issued to free up space on the Update CD. Customers who already

subscribe to AVCS should treat these as though they were update CDs and load each in turn. The ECDIS will only

load the additional new editions and updates necessary to bring the system database up-to-date.

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2.1 Introduction This section of the guide is intended to provide more detailed instructions and troubleshooting information for the

ADMIRALTY Vector Chart Service and provide answers to some questions that users may have after installing

AVCS.

AVCS ENCs are produced and distributed according to well-defined international standards. However each ECDIS

manufacturer has implemented the ENC import module of these standards differently.

As a result the functionality for loading and maintaining AVCS will differ from one ECDIS to another and this guide

provides generic information to assist in managing and maintaining AVCS holdings. This guide should be used in

conjunction with the User Manual supplied by your ECDIS manufacturer.

2.2 AVCS Overview The ADMIRALTY Vector Chart Service (AVCS) brings together Electronic Navigational Charts (ENCs) from national

Hydrographic offices around the world and new ENC coverage produced by UKHO in co-operation with Foreign

Governments to provide comprehensive, official, worldwide coverage.

2.3 Quality AVCS meets customer requirements for a comprehensive, world-wide, fully carriage compliant electronic chart

service. AVCS continues to develop in response to customer feedback through an ongoing programme of

enhancements.

UKHO has instituted a programme of assessment by its professional cartographers where the content of the ENC is

compared to relevant paper charts. Any navigationally significant differences are communicated to users of AVCS

through AIO. No other electronic chart service offers this level of reassurance.

2.4 Carriage Compliant AVCS only contains ENC data that meets Safety of Life at Sea (SOLAS) Carriage Requirements for use within

Electronic Chart Display and Information Systems (ECDIS).

2.5 Electronic Navigational Charts Electronic Navigational Charts (ENCs) are digital vector charts produced to the International Hydrographic

Organization's (IHO's) standards (S-57 Version 3.1 and ENC Product Specification). They are referred to World

Geodetic System 1984 Datum (WGS84) and are regularly updated with official update information distributed

digitally.

Hydrographic offices do not take any responsibility for the accuracy or reliability of privately produced, unofficial

charts.

2.6 Licensing The ENCs in AVCS are provided under a licence agreement that allows their use for defined periods of time. AVCS

Folios and ENC Units may be added to an AVCS licence at any time for periods of 3, 6, 9 or 12 months (where data

supply agreements allow). This offers maximum choice and the flexibility to match your chart holdings to your

operational patterns.

You will be provided with an AVCS media pack, containing world-wide AVCS data and receive weekly updates.

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3.1 General AVCS ENCs are distributed on both CD and DVD media and are encrypted according to the International

Hydrographic Organization (IHO) S-63 1.1 Data Protection Scheme.

The CD service comprises 9 base discs containing all ENCs and updates held in AVCS at the time of issue, these

are issued at intervals of approximately 8 weeks. In each week between bases, a cumulative update disc is issued

containing all AVCS updates issued since the most recent base.

The DVD service is a snapshot of all data available from AVCS provided on a single disc on a weekly basis. It

contains all base and update cells applicable at the time of issue. In this respect the DVD contents are equivalent to

an AVCS base release every week rather than bundling a single base release together with the weekly cumulative

update. This simplifies the work for the ECDIS in reading the data into the system.

These two AVCS formats are shown in the diagram at 3.2.

3.2 Media formats for AVCS

3.3 New AVCS Customers When subscribing to AVCS for the first time your ADMIRALTY Chart Agent will provide the following materials:

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CD Service


> AVCS Base Discs (a set of CDs labelled Base)

> AVCS Update Disc

> AIO CD (if you have a compatible display system and the Overlay has been added to your licence)

> End-user Licence Agreement for digital data services (EULA)

DVD Service


> AVCS DVD (containing both base ENCs and updates)

> AIO CD (if you have a compatible display system and the Overlay has been added to your licence)

> End-user Licence Agreement for digital data services (EULA)

In addition a number of type specific AVCS Installation Guides are available for download by following the link below

and selecting the Display Systems tab: www.ukho.gov.uk/AVCS

The latest base and update CDs or the latest DVD will contain all of the ENCs in AVCS. However these cannot be

accessed by the ECDIS until valid ENC Permits are installed.

3.4 The AVCS Licence In addition to the AVCS media your ADMIRALTY Chart Agent will provide you with an AVCS License Pack

containing the following:

> A Schedule A this is a PDF document listing the Folios and ENC Units that the user is licensed to use and which

Base CDs must be used to install the users licensed ENCs.

> A set of ENC Permit files (PERMIT.TXT and ENC.PMT) for each ECDIS on the AVCS Licence.

> A Certificate, carrying the UKHO crest and Chief Executives signature, which certifies that all charts supplied in

AVCS are ENCs that conform to the requirements of SOLAS Chapter V.

Each permit is unique and is the method which gives the user access to the required ENCs.

The ENC Permits will be supplied in a zipped file and the contents of this file will depend on the users bridge

configuration as each AVCS licence allows for use on up to 5 ECDIS. When extracted one or more set of permit files

(PERMIT.TXT and ENC.PMT) will be copied automatically into folder(s) named MASTER, BACKUP, RESERVE1,

RESERVE2 and RESERVE3 depending on the number of ECDIS configured on the bridge.

The permits may be supplied on physical media, separately by email or directly from e-Navigator. The contents

should be extracted to removable media, e.g. USB flash drive, that is capable of being read by the ECDIS system.

There are currently 9 AVCS Base CDs and the DVD contains 9 equivalent Volumes. It is unlikely that users will need

to install data from every one of the CDs or the equivalent folders on the DVD to load all of their licensed ENCs.

Reference to the Schedule A can avoid the unnecessary loading of CDs and save the user time.

3.5 The Schedule A The Home CD column of the Schedule A document informs the user which Base CDs or Volumes on the DVD are

required to install all licensed ENCs. A sample of the information contained in the Schedule A is provided below:

RFA03 English Channel Holding Expiry Date 31.12.2010

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Cell Title Home CD AVCS Update

GB301820 Isles of Scilly and Western Approaches AVCS Base 3 N/A

GB301840 Land's End to Falmouth AVCS Base 3 AVCS Update

GB302020 Falmouth to Looe AVCS Base 3 N/A

PACAS Asian Seas Holding Expiry Date 31.12.2010

Cell Title Home CD AVCS Update

GB202868 Tokongkemudi to Natuna Utara AVCS Base 9 N/A

GB202870 Pulau-Pulau Leman to Badas AVCS Base 9 AVCS Update

GB202872

Selat Karimata and Approaches AVCS Update N/A

Note: If the user does NOT have a copy of the Schedule A they should refer to the media.txt file at the root level of the AVCS disc to

determine which Volume contains the data for a given Producer Code. If in any doubt the complete set of AVCS Base CDs must be installed

to ensure that all licensed ENCs are imported to the system.

3.6 Data Cleansing New AVCS customers who had previously subscribed to other ENC services are strongly recommended to remove

(purge) all ENC Permits and ENCs from the system before installing AVCS. Previously installed ENCs may become

out of date if they are not licensed in AVCS. If the system is not purged redundant ENCs may remain in the system

database (SENC) and be available for use, even if the previous licence has expired. Instructions on how to remove

permits and ENCs are described in the ECDIS operators manual or the ECDIS specific AVCS Installation guide.

3.7 Public Key

Background

In order to load ENCs from AVCS onto an ECDIS the correct Public Key must be installed. This allows the ECDIS to

authenticate the source and integrity of encrypted ENCs from Service Providers. For AVCS ENCs authenticated

using the S-63 1.1 standard the, IHO public key must be used. If the correct Public Key is not installed the ECDIS will

report an Authentication Failure.

The Public Key can be formatted in one of two ways:

> ASCII text file (.PUB)

> X509 Certificate (.CRT)

Check the Public Key

Before installing AVCS ENCs encrypted using S-63 1.1 the user must check that the IHO Public Key is installed on

the ECDIS. If the IHO Public Key is not present on the system then it will have to be installed before AVCS ENCs can

be loaded.

New ECDIS are supplied with the IHO Public Key pre-installed. However users transferring from another service

may find that the system is using the PRIMAR Public Key. In this case the IHO Public Key must be installed before

AVCS ENCs can be loaded.

The IHO Public Key is contained in the root folder on any AVCS S-63 1.1 media, or is available to download by

following this link: http://www.iho.int/iho_pubs/standard/S-63/S-63_SA_Certificate.htm

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The procedure for installing the Public Key is different on each ECDIS and will be detailed in your ECDIS User

Manual. Specific instructions for some common models of ECDIS are available by following this link:

http://www.ukho.gov.uk/AVCS

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4.1 New ENC Permits You will automatically be issued with all necessary ENC Permits for access to new or replaced ENCs on your AVCS

license. Please ensure that you load the new permits before installing the latest media to ensure your ECDIS can

use the latest ENCs.

When updating AVCS new permits should only be installed on the ECDIS when the corresponding media has been received.

4.2 Updating The ADMIRALTY Vector Chart Service can be updated in one of four ways:

CD Issued weekly, the Update CD contains all the latest Notices to Mariners corrections, New Editions and any

New Charts issued since the last Base disc.

DVD Issued weekly, the DVD contains all the latest base and update information for AVCS on a single disc.

e-Navigator Planning Station Allows the user to create a custom exchange set containing the latest Notices to

Mariners corrections, New Editions and New Charts issued since the last time they updated their AVCS holdings.

AVCS Online Updating Service Allows the user to create a custom exchange set containing the latest Notices to

Mariners corrections, New Editions and New Charts issued since the last time they updated their AVCS holdings.

If you are using the AVCS CD or DVD service and you receive multiple discs at the same time, you only need to use

the most recent one because they are cumulative.

If replacement AVCS Base CDs have been issued, containing New Editions or Updates, subsequent Update CDs cannot be installed until the

Base discs have been installed.

Stored Routes and Updates

Updates applied to the ECDIS may have a navigational impact on an area covered by a stored route. It is important

to check the effect of any updates on these routes prior to their use. ECDIS is able to automatically check route

safety where licensed AVCS data is available.

4.3 Base Discs For users of the CD service, the UKHO periodically issues a full set of AVCS Base discs on CD in order to integrate

newly available data that has been issued on the Update CD. When this happens, all currently available Base discs

are issued simultaneously. All New Editions and updates are then included on the replacement AVCS Base discs

and no accompanying Update CD will be issued in that week.

On receipt of re-issued AVCS Base CDs, only an update routine needs to be run on each disc and there is no

requirement to reload all charts.

The AVCS DVD contains all base ENCs and updates available so there is no distinction between Base and Update

discs.

4.4 README.TXT File All AVCS discs contain a README.TXT file which includes important safety information that should be read before

using the service. For example it includes a caution concerning ENCs derived from charts which are not on WGS84

or a compatible datum.

The file is located in the ENC_ROOT folder and contains the following information:

> Specific charting practices of some ENC producers which may be significant to navigation.

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> Specific updating practices of some ENC producers such as delays between the issue of paper NMs and ENC

updates.

> Identified overlaps between ENCs which may cause problems in display systems.

> ENCs which have been withdrawn from service for any reason and which should not be used (permits will not

normally be issued for these ENCs).

> Specific licence and disclaimer text required by some ENC producers.

The README.TXT file is updated every week and changes are highlighted in a Latest Corrections section at the

beginning. The file should be read as part of the weekly ENC update process to ensure that all relevant changes are

understood.

4.5 Cancelled ENCs Periodically ENCs are cancelled as part of the continuous maintenance of ENC coverage worldwide. Normally

cancelled ENCs are automatically replaced and you will experience no loss of coverage in your ECDIS.

It is strongly recommended that you choose to delete any cancelled ENCs from the SENC as failure to do so may result in the ECDIS

displaying out of date data in preference to more up to date data.

4.6 Adding Chart Coverage Additional AVCS Folios and Units may be purchased during the subscription period through your chosen

ADMIRALTY Chart Agent who will supply new ENC Permits to unlock the newly added data. These permit files are

cumulative so as well as unlocking the new coverage they will also hold the permits necessary to unlock all your

existing coverage.

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The ADMIRALTY Information Overlay (AIO) is a digital dataset that is designed to be displayed over ENCs in ECDIS

and other chart display systems to provide additional information to the navigator. The Overlay contains all

ADMIRALTY Temporary & Preliminary Notices to Mariners (T&P NMs) and highlights navigationally significant

differences between ENCs and ADMIRALTY paper charts.

The Overlay gives seafarers an easy way to view information that they need, in addition to the standard chart, to

navigate safely and compliantly. The Overlay makes passage planning simpler and safer by clearly showing where

important Temporary or Preliminary changes may impact a voyage. It also gives seafarers the same consistent

picture of the maritime environment on their ECDIS as they have always had with the ADMIRALTY paper chart.

The Overlay includes all ADMIRALTY T&P NMs in force worldwide and additional information that relates specifically

to ENCs, published as ENC Preliminary NMs (EP NMs).

All ADMIRALTY T&P NMs that are in force are included in the Overlay. Each NM is displayed as a simple polygon

(usually rectangular) with hatched fill which indicates the area affected by the NM. Each NM carries the same NM

number that is used in the ADMIRALTY Notices to Mariners Bulletin.

The full text of the NM is included as an associated text file which can be displayed by selecting the 'Temporary

Notice to Mariners' or 'Preliminary Notice to Mariners' feature in the ECDIS Pick Report. Any associated diagrams

can also be viewed through the Pick Report.

The T&P NMs that are shown in the Overlay relate specifically to ADMIRALTY paper charts and are overlaid on ENCs to alert users to the

availability of this information when passage planning. Many ENC providers include some or all of this information in their ENCs and care

should be taken to understand what has already been included in the ENCs in use. A list of ENC producers whose policy is to include T&P

NM information in their ENCs can be found at www.ukho.gov.uk/AVCS and in the \INFO folder on all AVCS discs.

ENC Preliminary (EP) NMs highlight navigationally significant differences between ENCs and ADMIRALTY paper

charts. These NMs are displayed in the same way as T&P NMs, as a simple polygon (usually rectangular) with

hatched fill which indicates the area affected by the NM. Each NM is allocated a unique EP NM number.

The full text of the NM can be viewed in the ECDIS Pick Report against the Information attribute. Where additional

information is needed to explain the NM an associated picture file displays an image showing the ENC superimposed

over the current paper chart information.

The Overlay can be displayed on compatible ECDIS equipment and also in ADMIRALTY e-Navigator Planning

Station. Please see the UKHO website at www.ukho.gov.uk/AVCS for an up to date list of compatible equipment, or

consult your ECDIS supplier.

The Overlay data is held on a single CD and is installed and updated in the same way as ENCs. Please notify your

ADMIRALTY Chart Agent if you wish to use the Overlay on any compatible ECDIS so that the Overlay permit can be

added to the permit files for that equipment.

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6.1 Important Information for Users The International Hydrographic Organization (IHO) is aware that some ECDIS system manufacturers have

mistakenly incorporated some or the entire suite of ENC validation checks listed in IHO publication S-58 -

Recommended ENC Validation Checks. This has resulted in mariners being presented with misleading error

messages indicating that officially produced and released ENC data contains errors, when it does not. In some

cases, official ENC data is even being reported as not suitable for navigational use.

The majority of the checks in S-58 are intended for use in the ENC validation software that is used by Hydrographic

Offices or Regional ENC Coordinating Centres. These S-58 checks were not intended to be used in ECDIS software.

The introduction to S-58 reads, in part specifies the checks that, at a minimum, producers of ENC validation tools

should include in their validation software. This software will be used by hydrographic offices to help ensure that their

ENC data are compliant with the S-57, Appendix B1 ENC Product Specification....

Of particular concern are the S-58 checks classified as warnings. These checks are intended to highlight apparent

discrepancies in the data so that HOs or RENCs can investigate them further. Upon investigation, the data will

usually be found to be correct and no change to the ENC data is required. Such investigations are carried out by the

ENC producer, as well as by the Regional ENC Coordinating Centre before the data is released. Once an ENC has

been officially released, it is therefore not necessary or recommended that these checks be performed again by

ECDIS software, since any warnings of this type that are generated will be incorrect and will be misleading for the

user.

Many ECDIS manufacturers still implement the full suite of tests identified in S-58. This can result in unnecessary

errors and warnings being presented to the user either on screen or in a log file. Users should only report instances

where an ENC has failed to load; these are normally identified by the ECDIS as a fatal error or ENC failed import. In

these instances the UKHO will seek to resolve this with the ENC producer.

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As part of the IHO S-63 Data Protection Scheme, ECDIS have to include standard error/warning messages called

Security Scheme Errors (SSE). The table below shows a list of the SSE codes:

7.1 Common Error Codes

SSE 03 Certificate is invalid (Authentication failure)

SSE 04 Format of Certificate is incorrect (Authentication failure)

SSE 05 SA Digital Certificate file is not available (Authentication failure)

SSE 06 SA Digital Certificate is invalid (Authentication failure)

SSE 07 Certificate file is not available (Authentication failure)

SSE 08 Format of Private Key is incorrect (Authentication failure)

SSE 09 Signature is invalid (Authentication failure)

SSE 10 Files are different (check after decryption)

SSE 11 Cell Permit file not found (Decryption failure)

SSE 12 Cell Permit format is incorrect (Decryption failure)

SSE 13 Cell Permit is invalid (checksum [CRC] is incorrect / decryption failure)

SSE 14 Incorrect system date

SSE 15 Subscription licence has expired

SSE 16 ENC CRC value is incorrect

> Codes 03 to 09 relate to the ECDIS check of the authenticity of the discs being loaded

> Codes 11 to 13 relate to the permits supplied

> Codes 14 and 15 relate to checks on licence validity

> Codes 10 and 16 relate to checks carried out on the consistency of the ENC data

7.2 Decryption Failure This is normally due to the ENC Permit available not being compatible with the edition number of the chart being

loaded. Check that the latest permit files have been loaded. If the problem is not resolved by reloading the permits

then contact the UKHO Customer Services Team. Please inform them of the latest Base / Update being used, any

error messages displayed and forward a copy of the PERMIT.TXT file if using email.

7.3 Conversion Errors When charts are loaded into an ECDIS they are converted from the standard S-57 format they are supplied in to the

systems specific format of the ECDIS being used (the System ENC SENC). Conversion errors are reported when

the ECDIS is unable to interpret the detailed information within the chart during the conversion process.

Data being supplied within AVCS has been validated to very high standards and the number of errors being reported

should be low. However the ENC data standard (S-57) is extremely complex and in some circumstances it is

possible for the ECDIS supplier and ENC producer to have used subtly different interpretations of the standard and

this can result in a warning message being displayed on ECDIS.

When loading charts the ECDIS could report three error conditions:

1. The ECDIS is unable to load the chart or Update at all. This is very uncommon; please report this problem to the

UKHO Customer Services Team.

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2. The ECDIS loads the chart or Update and reports an error. This is not common; users should use the chart with

caution and report the error to the UKHO Customer Services Team.

3. The ECDIS loads the chart or Update and reports a warning. This is quite common on some ECDIS systems and

reflects minor interpretational differences of the S-57 standard. We are not aware of any evidence that the correct

operation of the chart in the ECDIS is affected in these cases.

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Many of the difficulties that could be experienced when using AVCS can be avoided by carefully following the

instructions provided in the ECDIS specific AVCS Installation Guide and the ECDIS Operators Manual. However,

issues that are known to have caused confusion in the past are detailed in the Frequently Asked Questions FAQs at:

http://www.ukho.gov.uk/Support

If you encounter problems that are not solved by referring to the FAQs, you may wish to seek technical support.

Please see the section below for contact details.

8.1 Technical Support You will receive the most effective support if you address your initial query to the correct organisation. This will usually

be the manufacturer of the ECDIS equipment, or the ADMIRALTY Chart Agent you obtain your AVCS charts from,

but in certain circumstances you may need to contact UKHO Customer Services.

Problem Contact

Hardware problems: difficulties with the keyboard, mouse, display or main system console, failure of a floppy disk, CD or DVD drive.

Software problems: difficulties with configuring or using the ECDIS system software, interfacing problems.

ECDIS Manufacturer

Chart installation problems: problems with installing certificates, permits and AVCS ENCs, standard error codes displayed (see AVCS User Guide).

Chart content problems: display anomalies or mismatched data displays.

ADMIRALTY Chart Agent

Problems that have not been resolved by your ADMIRALTY Chart Agent. UKHO Customer Services

When reporting a chart related problem it is useful if you can provide the following details:

> Licence Number

> Vessel Name

> ECDIS/Software Manufacturer

> Details of error message Including SSE error code

> Screen shot(s) of error

> Details of Base Discs or DVD used (date)

> Details of Update CD used (date)

> Details of permits used (date)

> Details of Cell number(s) errors apply to

> Have there been any configuration changes to computers

> Details of User Permit(s) and PIN(s)

Emergency ENC Permit Generation

In certain circumstances it may be necessary for a vessel to get access to an AVCS chart at very short notice, for

instance if a vessel needs to be diverted due to a medical or safety emergency. In these emergency circumstances

only, individual AVCS ENC Permits can be obtained from the UKHO 24 hours a day, 365 days a year. These permits

can be transmitted direct to the vessel by email, by fax, or simply by reading the characters out over the telephone or

radio.

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To obtain an AVCS emergency permit please contact UKHO Customer Services. Please quote your Vessel Name,

the User Permit Number of your ECDIS system and the required ENCs.

Support Hours: 24/7

Telephone: +44 (0) 1823 723366

Facsimilie: +44 (0) 1823 330561

Email: [email protected]

Contact: UKHO Customer Services

Web: www.ukho.gov.uk/Support

8.2 Feedback We hope this User Guide assists you in using the ADMIRALTY Vector Chart Service with your ECDIS. If you have

any feedback on the content of this guide, or any of the AVCS Installation Guides please forward your comments to

UKHO Customer Services.

1 Quick Start GuideElectronic Navigational Charts (ENCs)Before You StartCD UsersDVD UsersAll users

ECDIS Containing Existing ENCsStep 1: Install the Public KeyStep 2: Install PermitsStep 3: Install AVCS ENCsStep 4: Update AVCSStep 5: Install the ADMIRALTY Information OverlayStep 6: Maintain your Holdings

2 ADMIRALTY Vector Chart Service Overview2.1 Introduction2.2 AVCS Overview2.3 Quality2.4 Carriage Compliant2.5 Electronic Navigational Charts2.6 Licensing

3 Getting Started3.1 General3.2 Media formats for AVCS3.3 New AVCS CustomersCD ServiceDVD Service

3.4 The AVCS Licence3.5 The Schedule A3.6 Data Cleansing3.7 Public KeyBackgroundCheck the Public Key

4 Installing and Maintaining the Chart Outfit4.1 New ENC Permits4.2 UpdatingStored Routes and Updates

4.3 Base Discs4.4 README.TXT File4.5 Cancelled ENCs4.6 Adding Chart Coverage

5 ADMIRALTY Information Overlay6 S-58 Recommended ENC Validation Checks6.1 Important Information for Users

7 Security Scheme Errors (SSE)7.1 Common Error Codes7.2 Decryption Failure7.3 Conversion Errors

8 Getting Help8.1 Technical SupportEmergency ENC Permit GenerationSupport Hours: 24/7

8.2 Feedback

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