probably not enough chain out mate.
1/check the water depth
and allow to put out the depth
x 5. Also check how your depth sensor is set up, is it water
under the keep or actual depth. the best way is to measure it accurately with a tape measure. Drop a line over the edge of your boat now with a weight on the end. See when it hits the bottom, mark the rope
, pull it up and measure the depth, now check on your instruments the depth shown. Are they the same or do you need to adjust the instrument.
2/ after you let out 25m of chain for 5 m of water, attach the bridle
at the 25m mark. You should put some marks along the chain starting at 20m, every 5 m. Make up a system, like, one cable tie at 20m, 2 at 25m, 3 at 30, etc, or use colored ones or you can buy neat little plasic chain markers from the chandlery
, or an electric
chain counter. 5;1 scope
is minimal, if it was blowing 20+ knots I would use 7:1, ie 7 x depth (5) = 35m chain.
3/ after you attach the bridle
let out approximately 10-15 more meters of chain, this should take the weight off the chain and transfer it to the bridle, as well as creating extra weight at the bridle, which helps hold the chain lower in the water, better holding. Normally you would allow for the freeboard (height from water to anchor
roller) in the scope
calculations, however as the height is approximately 1m, and the bridle approximately 6m forward, you don't really need to worry about that.
4/ reverse with both engines at 2200 rpm
. when the chain is tight place a waypoing on your plotter and watch to see that you dont drag off the waypoint. leave the engines reving for 1 or 2 minutes to make sure you are holding fast. If it drags you may need to pull it up and repeat the process, or it may set after a few meters.
5/cut the engines and put up your anchor
ball day shape or anchor light at night, set anchor alarms if you haven't already. Go for a swim if its warm and shallow enough and take a look at the anchor, make sure it is set well and buried in the sand.
I usually set my anchor alarm
as I drop the anchor. I also usually place a waypoint on the plotter as I drop the anchor as a reference point.
If there is no wind
you may need to reverse slowly as you lower the anchor to try lay the chain in a neat line on the seabed. Its no good if its piled on top of the anchor.
So remember, check your instrument so you know when you read 5m deep, is it 5m under my keel
, or 5m from my waterline. I prefer it set to the waterline, but some people prefer under the keel
. You can also set a shallow water alarm
for water under 2m or so.
So yes, very important , at least 5:1 scope and 7:1 if its windy, the more the better for good holding, but sometimes busy anchorages
or small bays don't allow for more than 5:1. Also very important to take the load of the chain from the windlass
by letting out at least 10-15 m after you clip on the bridle.
I dont know how you attach the bridle to the chain, a shackle or clip. We use one like this which works OK