Before anchoring 1

When you are selecting an anchoring position, make sure that it is sheltered from the wind and waves, and away from ship or boat traffic.
Check the chart to determine the depth where you wish to anchor, and calculate the amount of cable you should pay out. As a minimum, you should pay out-for rope cable with a length of chain – five times the depth of water in which you wish to anchor plus the distance from the water to the bow where the anchor is attached.
For example, if you measure a water depth at 7 meters (23 feet) and the distance from the water to the bow where the anchor is attached is 1 meter (3,2 feet), then the total distance of 8 meters (26.2 feet), should be multiplied by five to get the amount of cable to pay out.
The result is 40 meters (131 feet) of cable.
For chain cable the minimum ratio is 3 to 1
The deeper the water, and the more severe the weather, the more cable you will need to pay out.