Gravity causes the ships iron anchor to sink to the ocean.
It's not a hole, it's a rivet. In the event that the anchor becomes stuck the rivet will shear before breaking the anchor, thus setting the anchor free.
A Hawse Hole Is A Hole In The Bow Of A Ship For The Cable For An Anchor.
unknown
seaport
harbor
throw the anchor out stupid
hawse
The hawze pipe.
The links mean nothing. Rope is sometimes portrayed. Either where used to anchor ships in the age of sail.
Harbor
A set of crossed compass bearings as observed from a vessel laying at anchor to identify the ships position.