Piloting and Anchorage LAB

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Piloting and Anchorage LAB
11/20/2009
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QA Last Class

• Chain on board a ship.
• 1 shot 15 fathoms 90 feet
• Deep water anchor - 14 shots of chain
• Normal anchor - 12 shots of chain

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NOTICE TO MARINERS

• RICE LAND and LOCAL CHARTS
• Local depth increased by factor of 6
• Land Distances Shrunk by factor of 2
• Range Scale should be 0-500-1000 yds
• Soundings in Fathoms

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Lab
At time 1300 Fix is taken You are on Course
080T, 15 kts (3 minute fix interval) METOC
Expected wind and current to be southwesterly
FIND SUITABLE ANCHORAGE AND PREPARE CHART FOR
ANCHORAGE
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LAB
SHIP CHARACTERISTICS Draft 36 ft Length 1092
ft (H-gtP 400 ft) Speed 15 kts Standard Rudder
Angle Angle of Turn Transfer (yds) Advance
(yds) 15o 18
180 30o 30
230 45o 60
270 60o
110 310
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LAB

• How much chain is needed?
• Good Head Bearing/Approach track?
• Good Turn Bearing?
• Swing/Drag/Let Go Circles
• Range Arcs
• Advance and Transfer...