Passage Planning Sheet

Swing basin

diameter

350m

Outer

Channel Inner

Channel Maitai

Channel Low Water at

Berth

Departure Vessel readiness

Controlling Depth ( m ) 8.1 7.6 4.5 Main engine tested

Height of Tide ( m )

Steering gear tested

Total Water Depth ( m )

Thrusters tested

Draft ( m ) Anchors ready

Static UKC ( m ) Vessel defects

Loss of UKC due Roll ( m )

Loss of UKC due Heave ( m )

Loss of UKC due Squat ( m )

Net static UKC ( m )

Date / time POB

Name of Pilot

Name of Vessel

L x B

Draft

Tidal Class

Configuration

Tug WH Parr 20t

Tug’s line

Tug Toia 50t

Tug’s Line

HW

LW

Range

Tide Interval

Max Current

Wind

Wave height / period

First Line

Pilot Ladder

Passage Planning Sheet

000 T / 180 T

Wind Calculation

Wind speed ( kt ) Wind Force per 1000 m² ( tonne ) Tug Toia 50t

15 3.1 Tug WH Parr 20t

20 5.6 Bow thrust Windage area of vessel ( m² )

25 8.7 Stern thrust Wind force per 1000 m²

30 12.5 Total side thrust Total wind force

35 17.0

Note: A 200m car carrier has a windage area of 6240 m², a 180m tanker at 6m draft has a windage area of 2400 m²

Note: Wind force per 1000 m² ( tonne ) = V² / 18 ( V is windspeed in metres per second )

Note: Thrust ( tonne ) = Thrust ( KW ) * 0.013

Loss of UKC Calculation Squat ( assumes high Cb vessel )

Speed ( kt ) Loss of UKC ( m )

Inner Channel Outer Channel

3 0.2 0.1

5 0.5 0.2

7 0.9 0.5

Roll ( assumes 32m beam )

Roll Angle ( deg ) 1 2 5

Loss of UKC ( m ) 0.3 0.6 1.4

Heave

Period ( seconds ) Wavelength ( m ) Allow for heave if:

5 50 LOA < 100m

10 100 LOA < 200m

15 150 Always

20 200 Always

Loss of UKC = waveheight / 2