Anchoring Flashcards
What are the 9 things to think about when choosing an anchorage
Check the chart to make sure you are not in an anchor restricted area
Check that you are not infringing local port authority rules
Check the weather to make sure the vessel is not going to be on a lee shore on a strong wind
Check the chart to see if the area is free from obstructions, rocks or anything else that could cause the anchor to become snagged
Check the chart to make sure that the seabed is suitable for anchoring eg sand, kelp, rocks, mud, pebbles, ect
Check the area has reasonable shelter
check the tide and current to make sure the boat can swing
Check that you are out the way of other boating traffic
Check that you have enough room to clear obstructions or other vessels if the vessel swings in the tide or wind
What are the 4 ways to check the anchor is secure?
you can reverse the boat, and if the chain trembles the anchor is dragging, whereas if the bow dips the anchor is digging in
You can Watch a transit off the beam of the boat, and if it goes out of line then the vessel is dragging
The depth sounder can be used to watch for changes in depth, allowing for the rise and fall of the tide
The Gps can be used to make sure the boat is only moving in an arc around the anchor
Why is height of tide important to consider when anchoring
to make sure that the boat won’t dry out, and to make sure you pay out enough anchor warp to have an appropriate scope at high tide
What depth of water should the skipper layout anchor warp for
4-8 times the maximum depth of water a hight tide, otherwise at high tide the anchor will be less secure
What is the maximum amount of water the skipper can anchor in
Max depth = length of anchor chain/ 4 - 8 (depending on weather). This is depth at high tide
what is the minimum depth that the skipper can anchor in
Min Depth = Draught + Clearence
What must be displayed when anchoring during the day
An anchor ball
what must be Displayed when anchoring at night
an all-around white anchor light
What is anchor warp
A nylon Line used as part of the Anchor chain, as its cheaper
When using anchor chain, how much should be let out
4-8 times the depth of water at high tide depending on weather conditions expected
When using anchor warp how much should be let out
6-10 times the depth of water at high tide depending on weather conditions expected
What are the steps for anchoring in a strong 2-way tidal flow
First, set your main anchor, and pay out all your chain/warp. Then set your second anchor, such as a kedge or spare anchor at the downstream side of the boat, then motor forwards taking in chain on the first anchor and letting it out on the second until the two anchor warps/chains have the same length.
When anchoring in a strong 2 way tidal flow, whats important to consider
the boat has room to swing on either anchor and that both have enough chain and warp to hold the boat individually.
When anchoring in a strong 1 way tidal flow what should you do
place 2 anchors in a y shape at a 30 degree angle apart, both with enough chain or chain and warp to hold the boat on its own.
why does the chain lying on the sea bed help the anchor hold?
its weight keeps the stock of the anchor lying flat on the seabed, causing the fluke of the anchor to dig in.
