BRIDGE CLEARANCE
Be aware that your
vessel requires a
specified bridge
clearance height. This
height is a measured
estimate from the
waterline to the top
of the highest object
usually the power
tower, radar or the
masthead light depending on what tower equipment is installed. All
canvas should be in the stored position. The estimated height can
change because of variances in the loaded condition of the vessel.
Consult the estimated bridge clearance specifi cations located in Chapter
12 (technical information section). An easy way to measure bridge
clearance is to have someone place a long straightedge such as a piece
of wood at a 90 degree angle across the highest point of the boat with
the boat in the water. Then with a tape rule measure the distance straight
down (90 degrees) to the waterline. Take this measurement with the
fuel and water tanks 1/2 full and only 1 person besides yourself on
board. This will give you a safe measurement. As your boat is loaded
down with people the bridge clearance will be slightly lower.
Some bridges are tendered. Know and use the proper bridge signals
when approaching these bridges (see bridge signals on page 2-3). You
can also monitor and communicate on channel 13 of a VHF radio
for bridge information in most domestic locals. Other bridges are
marked with a clearance measurement and you are on your own. After
determining your vessel will clear the bridge proceed with caution at a
safe idle speed. Keep your eye on vessel traffi c at all times in order to
react quickly. Resume a safe speed once clear of the bridge structure
and acknowledgment of clear visibility.
Use common sense regarding bridge clearance because since injury and
property damage could result if a mishap occurs with a bridge structure.
2-10
CHAPTER 2
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