User`s manual

Freq uently Asked Questions (con’t)
Can the SportScan be damaged in any way by operating it out of the water?
No, the SportScan can not be damaged by operating it in air. In fact, all units receive a
24 hour burn-in test (in air) before shipping. However, if you do operate it in air (i.e. on
the deck of your boat), ensure that the unit is not sitting in direct sunlight for extended
periods of time.
How much hard drive space is required for saving the .81S SportScan data files?
Storage consumption is typically about 10–15MB per hour.
How fast can I tow the SportScan?
The best images are developed when towing at about 2-3 knots. The slower the tow
speed, the more echoes you will get from any one target and the better the sonar image
will appear. Depending on the type of boat you are using, you might need to run as slow
as the boat will travel.
What is Speed Correction?
Speed Correction is a process which adds or removes data lines from the sonar image
in order to produce a 1:1 aspect ratio on the screen (so a square target appears square
and not rectangular). The SportScan transmits and receives data at a fixed rate
depending on operating range. If the tow speed increases, the distance traveled is
greater, but because the rate remains constant, the sonar image will be compressed in
time (along track). Speed Correction will compensate for this compression by adding
lines in the data at the appropriate places.
Using the speed from your GPS receiver will give the best results as it will constantly
update in real time. Using manual speed entry will suffice if a GPS receiver is not
available.