vhf-hf/ssb-ais terry sparks commander usn retired
TRANSCRIPT
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VHF-HF/SSB-AIS
Terry SparksCommander USN Retired
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AgendaWhat Communications Systems are
Available?License RequirementsWhat Can I Expect when using the different
SystemsOperation of VHFUse of Portable VHF
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AgendaBreak – 20 minutesDigital Selective Calling (DSC)Maritime Mobile Service Identity (MMSI)Automatic Identification System (AIS)Installation of VHF RadiosInstallation of AIS Receiver
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What is AvailableVHF Marine Radio (Very High Frequency)VHF Hand Held RadiosHF/SSB Radio (High Frequency/ Single
Sideband)Cell PhoneAIS (Automated Information System)
Satellite Phone also available, but not part of training.
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License RequirementsVHF Marine Radio – None US Operation Only
Since 1996 for recreational boatersIn US only communicating with other US
Boaters VHF Hand Held Radios – Same as aboveAIS – As required by VHF Radio
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License RequirementsHF/SSB Radio
Ships License or Ham dependent on frequency use
Ships License and Call Sign covers EPIRB, Radar, HF, AIS, and VHF
Also requires Operator’s PermitCell Phone – None
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Prospective of the HorizonHorizon in NM=
Distance to the horizon in Nautical Miles1.17 X square root Sum of heights
Height of Self + Height of other
So if you are both at 8 feet1.17 X SQRT(8 + 8)1.17 X 4= 4.68 NM
A 50 foot Mast at both locations = 11.7 NM
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What Can I ExpectVHF Marine Radio
Line of site Communications Top of Mast to Radio Tower could be 40 milesBoat to Boat may only be 3-11 miles
VHF Hand Held Radios1-3 miles depending on your position and the contact
antenna height. HF/SSB Radio - Potentially Around the worldCell Phone – Similar to VHF to cell tower, then the
world.AIS – Similar to VHF,
But will work at very low signal levels (digital signal).
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Why install a VHF Radio?Chances are:1.You do not have the Cell phone number of the
boat 100 yards away.2.You do not have the Cell phone number of the
Coast Guard.3.You do not have the Cell phone number of the
Ship headed your way.4.Your Cell phone will not work.
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Volume Level
in Speake
r
Squelch Threshold to hear
16 Over-Ride
Push To Talk
Distress
Channel Select
Scan
DSC
Weather
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Channel UseChannel 16
Emergency and Hailing Channel.“No” Radio Checks
Coast Guard: 22ACommercial Operations:
01, 07, 08, 09, 10, 11, 18, 19, 63, 67, 79, 80, and 88.
Safety: 06 Used for ship-to-ship
emergency comsCoast Guard S&R
Vessel-to-vessel navigational safety: 13 **
Noncommercial working channels:09, 68, 69, 71, 72, and 78
DSC – 70 Port operations:
01, 05, 12, 14, 63, 65, 66, 73, 74, and 77
Not for public use:15, 17, 21, 23, 81, 82, and
83
** 1W Power Only
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Phonetic AlphabetAlphaBravoCharle
yDeltaEchoFoxtrotGolf
OscarPapaQuebecRomeoSierraTangoUnifor
m
HotelIndiaJulietKiloLimaMikeNovemb
er
VictorWhiskeyX-RayYankeeZulu
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Radio Use1. Listen for anyone else using the channel
Make Sure the Squelch is not to high
2. Hail on Channel 16 to make contact (or use DSC)3. Then move to another channel (61, 63, 64, 68-72
and 78)
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Radio Use When Contacting a Commercial vessel or Bridge,
Try calling on 13. (Vessel Bridge to Bridge) Vessel Traffic System – Commercial Ship routing in
Traffic Lanes. Channels 5, 11, 12, 14 Good to let them know you are there and where you
are going and scan for others being routed Marinas frequently use channel 68 as a contact
channel If you are talking to someone close, reduce power
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Emergency Communications1. The boat is in grave and imminent
danger Distress (mayday)
Calls are used when the boat is in grave and imminent danger and in need of immediate help.
That means someone could die or vessel is sinking fast!
Rescue authorities can reasonably expect you to leave the yacht if a rescue boat or helicopter arrives. (No arguments)
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Emergency Communications2. The boat or a crew member needs
urgent help Urgency (pan pan) Calls are used when the boat or a crew
member needs urgent help The boat is not in grave and imminent danger.
No one will die if help is slow The boat will not sink before help arrives
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Emergency CommunicationsExample: On Channel 16
Pan Pan, Pan Pan, Pan Pan, This is the vessel Lead Weight. We have a slow leak and the engine has failed. We are at Lat 47.234 Lon 126.234 drifting west
at a speed of approximately 1 knot. There are 4 people on board. All have life
Jackets on.Lead Weight is a brown vessel with white trim. Standing by on channel 16
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Emergency Communications3. Safety (SECURITÉ)
securtité
Calls are used for navigation or weather warnings.
Pronounced – “say cure it tay”.
Example: On Channel 16Securite, Securite, Securite, There is a large log
floating under the water at Lat 47.234 Lon 126.234 drifting East at approximately 0.5 knots.
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VHF Operation – Emergency Communications
1. Call on Channel 16
2. Listen for Clear Channel
3. Repeat: Mayday, Mayday, Mayday
4. Provide Call Sign (3 times) and Name of Vessel
5. Provide Position information – “Lat & Lon”
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VHF Operation – Emergency Communications6. State the Nature of Problem – “Hit underwater Rock
Vessel sinking”
7. Number of People on board and Status – “4 People on Board, one unconscious”
8. Seaworthiness of Vessel – “Taking on Water”
9. Describe Vessel – “Cream Colored 45’Sloop”
10. Channel Monitoring – “Monitoring Channel 16”
11. Repeat until answered
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Emergency Communications When Reporting a Mayday or Pan Pan:
1. Make Sure all have Life Jackets on2. Make sure someone is monitoring the radio3. Be Prepared with Position Reports4. Be Prepared to update Personnel Status5. For a Mayday, prepare to leave the boat.
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Use of Portable VHFMay be used around the MarinaVHF Not for use in Town as a family radio
Family Radio Service (FRS) is an improved walkie talkie radio system authorized in the US 1996.
This personal radio service uses channelized frequencies in the (UHF) band.
US FRS radios may not be used in MX. Must buy similar radios in MX certified for MX.
Good to have in a Ditch Bag (with Extra Batteries)
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Digital Selective Calling (DSC)DSC available on MF, HF and VHF DSC is primarily intended to initiate
radiotelephone calls. (Emergency and non-emergency)
DSC calls can also be made to individual stations, groups of stations, or "all stations" in one's reach.
DSC use requires an assigned/unique 9-digit Maritime Mobile Service Identity (MMSI)
Distress
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Digital Selective Calling (DSC)DSC radio - ability to send an automatic
"mayday" that identifies the vessel and location.Radio May also send information on Type of
IssueMust be set up with MMSI numberMust be tied to GPS position Data to be
effective
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Digital Selective Calling (DSC)Allows contacting a friend via DSC without
hailing on channel 16Like using your cell phone.Private ship-to-ship calls to other vessels
equipped with DSC radio. If you know the MMSI number of the radio you
are calling only that vessel will receive you message.
DSC allows contacting of a Group /Club Privately
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MMSI NumbersUnique nine (9) Digit FCC Identification
NumberLike your Telephone Number for RadiosIncluded with Ships License from FCCMay also be Obtained from Boat US and Sea
Tow
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MMSI NumbersUS VHF Users Only
http://www.boatus.com/mmsi/http://www.seasmartvhf.com/
Those Who Travel/Communicate Outside the U.S.http://wireless.fcc.gov/services/index.htm?
job=licensing&id=ship_stations Must apply to the Federal Communications
Commission for a ship station license. Ships License includes an MMSI Also need Operators Permit Installation of Marine SSB requires Ships License
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AISDigital Communication of Ships informationTransmitted on VHF Radio FrequenciesChannels 87 and 88B
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AIS ClassesClass A Marine AIS - Large
commercial vessels, is the full specification. May See Class B also
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AIS ClassesClass B Marine AIS Lighter
commercial and leisure vessels.
Must have assigned MMIS
Raymarine AIS 500
West Marine AIS 1000
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AIS ClassesReceive (Rx) Monitors the AIS network
Both Class A and Class B Receives positional data reports for on-screen
display. Dual Channel reads both frequencies at the
same time.Single Channel, reads one channel then the
other Slower to get all the data Costs less
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Stand-Alone AIS
Graphical heading-up situation display shows all targets and nav aids within the selected range. Dangerous or lost targets are indicated.
Pop-up information box shows details for selected target.
Unique CPA plot shows whether target will pass ahead or astern. Helps you determine the best collision avoidance strategy.
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AIS Type InformationName of VesselCall SignMMSIDraughtLengthBeamPosition
Lat & Lon Heading
COGSOGCPA
Bearing and RangeTCPADestinationETAStatusVessel Type
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Installation of VHFSelect a location you can use when driving
the boatThe Speaker has a magnet in it so be careful
of interaction with compassMake sure the radio is waterproof if in
cockpitAn in-line fuse to the radio should be used.
Tap off Breaker feeding Cockpit with heavy wire if long run
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Installation of VHFAntenna should be as high as possible
Max range is proportional to the Antenna’s Height.
Your height plus the height of the other station
NMEA 0183 from GPS (NEMA Out Connection)Provides position data to radio for DSC
If two radios are used An antenna switch must be usedOr two Antennas must be installed
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RG58/RG8/
RG213
+
-
12VDC
In-line fuse
NMEA 0183From GPSFor position
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Installation of VHF - IssuesHum in the radio can occur when charger is
onPoor filtering on charger (Goes away with
Charger off)Can add a large capacitor at point of
connection to 12V power.Poor connection to antenna can result in
Minimal received signalNo transmitted signalBurning out radio output amplifier
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Installation of VHF - IssuesSpeaker too close to Compass
Compass will mot read properlyLong power run to radio with to small of
wirePoor radio operation as battery voltage
decreases No static out of radio with squelch low
Microphone is keyedStatic out of radio
Turn squelch control up to quiet radio
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Installation of AIS ReceiverStand-Alone Units
Have own displayProvides relative position data of Class A&B
AIS.Specific Requirements should be listed in
Vendor Installation Vendors Include:
Furuno AIS FA150 VESPER Marine AISWatchMate
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Installation of AIS ReceiverIntegrated Receiver and GPS Display
Components Antenna AIS Receiver Connection to Graphical Display or PC
Many Vendors of single and dual Channel Receivers
AIS units use a default baud rate of 38400 Can connect to NEMA in on Multifunction Display Can be wired to connect to a 9 pin RS232
Can then adapt to a USB Port
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Installation of AIS Receiver
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To Keep you Safe at Sea!West Marine AIS 1000