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Calculating the chain per turn
This is the length of chain that is released during one complete revolution of the
chainwheel. The chain per turn for some windlasses is listed in Appendix 1. If your
windlass is not listed follow the instructions below to calculate it.
Step 1 use adhesive tape to place a mark on the
chainwheel.
Step 2 use adhesive tape to place a mark on the
chain coming out of the chain wheel.
Step 3 use adhesive tape to place a mark on the
deck below the mark on the chain.
Step 4 Carefully release the chainwheel so that it
can be turned by hand to feed the chain out.
Step 5 Using the mark on the chainwheel as a guide,
turn the chainwheel one revolution, causing
the chain to be released on to the deck.
Step 6
Measure the length of chain from the mark
on the deck to the mark on the chain.
Step 7 Enter this measurement.
Calculating the rope per turn
This is the length of rope that is released during one complete revolution of the chainwheel.
you need to measure the length of rope pulled through for 10 revolutions and divide the
result by 10. See instructions to calculate the rope per revolution below.
Step 1
Carefully release the chainwheel so that it
can be turned by hand to feed the rode out
until you have rope.
Step 2 As you did for the chain, use adhesive tape
to mark the chainwheel, the deck and the
rope. (See the instructions for the chain per
revolution above).
Step 3 Using the mark on the chainwheel as a
guide, pull the rope out by hand until the
chainwheel has completed 10 revolutions.
Step 4 Measure the length of rope pulled, divide it
by 10.
Step 5 Enter this measurement.
Metric Inches Conversion Table
Inches
Metric Inches
1/8
0.125
1/4
0.25
3/8
0.375
1/2
0.5
5/8
0.625
3/4
0.75
7/8
0.875
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Chainwheel Mark
Chain Mark
Deck Mark
Distance to Measure
Chainwheel Mark
Distance to Measure
AutoAnchor Setting
(to 1 decimal point)
0.1
0.3
0.4
0.5
0.6
0.8
0.9
PART 4 usING The AA150
4.1 INsTAllATION, seT uP ANd TesTING
Before the AA150 is used it is must be set up for the windlass and rode on the
boat and tested in a calm, safe environment. use the windlass to raise and lower
the anchor. If the AA150 does not count, or any diagnostic messages appear on
the screen, refer to Troubleshooting (Part 5), your supplier or the AutoAnchor
manufacturer for assistance.
4.2 OPeRATION
The AA150 is automatically turned on when the windlass is powered up. When the
windlass is operated the AA150 displays the length of anchor rode deployed. The unit will
remember the settings entered and the count even when the power is turned off. It will
also beep during retrieval to warn the skipper the anchor is within 1.5 metres (4 feet) of
docking.
If counting greater than 99.9 metres or feet the display will drop off the decimal place and
display only whole metres or feet.
Note: If there is a sensor or a load error the AA150 will not count accurately. (Refer to
Troubleshooting Part 5)
Indicator pulses when the
Chain Mark
sensor is operating
Deck Mark
Notes when Anchoring
The AA150 helps to make anchoring less stressful but nothing can replace good
seamanship and safe boating practices.
when anchoring:
• use the windlass strictly according to the windlass manufacturer's
instructions;
• personally control and supervise all windlass and anchoring operations;
• maintain a clear view of the windlass, rode and/or anchor during windlass
operation; and
• always ensure the anchor is fully docked and secured before moving the boat.
Displays when chain is
present
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