Wave And Wake Jumping - Mercury 25 Jet 4-Stroke Manual

Wave And Wake Jumping

Operating recreational boats over waves and wake is a natural part
of boating. However, when this activity is done with sufficient speed
to force the boat hull partially or completely out of the water, certain
hazards arise, particularly when the boat re‑enters the water.
The primary concern is the boat changing direction while in the
midst of the jump. In such case the landing may cause the boat to
veer violently in a new direction. Such a sharp change in direction
can cause occupants to be thrown out of their seats, or out of the
boat.
Avoid serious injury or death from being thrown within or out of
a boat when it lands after jumping a wave or wake. Avoid wave
or wake jumping whenever possible. Instruct all occupants that
if a wake or wave jump occurs, get low and hang on to any boat
hand hold.
There is another less common hazardous result from allowing your
boat to launch off a wave or wake. If the bow of your boat pitches
down far enough while airborne, upon water contact it may
penetrate under the water surface and submarine for an instant.
This will bring the boat to a nearly instantaneous stop and can send
the occupants flying forward. The boat may also steer sharply to
one side.
GENERAL INFORMATION
WARNING
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