Dragging your feet in the water to slow down when approaching a mark
is against the rules:
42.1 Basic Rule
Except when permitted in rule 42.3 or 45, a boat shall compete by
using only the wind and water to increase, maintain or decrease her
speed. Her crew may adjust the trim of sails and hull, and perform
other acts of seamanship, but shall not otherwise move their bodies to
propel the boat.
