Formula Cruiser Owner's Manual page 103

It is a good idea to ask local authorities if there
are hazardous areas and how they are marked.
Boaters must also recognize the flag designs
which indicate that skin divers are present and
keep well clear of the area.
Skin Diver Warning Flag
Figure 7-27
Watch for swimmers. Swimming areas may not be
marked. Steer clear from the area and remain
alert.
FORMULA
Navigation markers serve as a means of
identifying navigable routes, and indicate water
hazards. Boaters should become familiar with
navigation markers and stay within marked
boundaries and clear of hazards.
KC-0250
CRUISER/SUPERSPORT
OPERATION
Swim Area Warning Buoy
Figure 7-28
KC-0260
7-25