A sentinal, of a given weight, has more effect, the further it is from the boat.
Force = mass x distance.
The sentinal force does not depend on the total
rode length (scope).
This force is not neutralized once the
rode is straightened, and the sentinal elevated.
A sentinal’s downward force, tends to keep the
rode parallel to the bottom (improving the
anchor’s holding power), whereas the bouy tends to lift the
rode, increasing the
anchor’s tendancy to plow. Both (sentinal &buoy) provide elasticity to the
rode.
FWIW,
Gord