An upside down 505, from the bow
Note the unique hull flare that makes the boat much wider at the
rail than at the waterline. The flare deflects spray, and provides
additional stability as the boat heels. The flare forward prevents
the bow from digging into waves and possibly pitchpoling. The
extra width at the rail gets the hiking skipper and the trapezing
crew further out for more righting moment.
The same 505 hull viewed from astern
The line separating the white and blue is actually somewhat above
the true waterline (with the boat right side up). The amount of
hull actually in the water is rather less than all the white part
You can see two Elvstrom bailers. The larger bailer is further
aft, where water collects when the boat is planing. The smaller
bailer is forward, where water collects when the boat is not planing.