Lowrance LMS-480 Operation Instructions Manual page 45

Front
Install the gimbal bracket. Orient the bracket so the arms slope toward
Drill a 1-inch (25.4 mm) hole in the dash for the power, transducer and
antenna cables. The best location for this hole is immediately under the
gimbal bracket location. This way, the bracket can be installed so that
it covers the hole, holds the cables in position and results in a neat in-
stallation. Some customers, however, prefer to mount the bracket to the
side of the cable hole — it's a matter of personal preference.
137.9
[5.43]
Front view (left) and side view (right) showing dimensions of LMS-480
sonar/GPS unit when mounted on gimbal bracket.
the front of your unit.
173.9
[6.85]
Millimeter
[Inch]
23.4
[0.92]
157.9
[6.22]
56.9
[2.24]
37
72.9
[2.87]