150 feet of anchor line may not just fall in, and chain along with an anchor stowed on the bow rail might add unwanted weight that far forward
Rope:
Diam. | Lbs/100ft | Strength
3/8 in. ____ 5 ______ 3240
1/2 in. ____ 8 ______ 5670
5/8 in. ____12______ 8910
1/4"dia chain = .69lbs/ft.
x 25' = 17-1/4lbs
125' 1/2" rode + 25' 1/4" chain ≈ 27-1/4lbs to anchor at 7:1 in maximum of 21'.
If using all chain, a 4:1 will work for a 22' 2000lb boat on 1/4" chain, requiring 84ft. of chain. That's a maximum weight of ≈ 58lbs. (Not including the anchor, of course).
Replacing the 125' of rode plus 25' of chain, that comes to an additional weight of ≈31lbs.
-Will