5.1 Longitudinal Location

The Seakeeper Ride Controllers will be mounted to the transom, the approximately vertical surface at the aft end of the running surface, as shown in figures below. 

In Quad Controller installations, the outer Controllers, P1 and S1, may be installed at a different longitudinal location from the inner Controllers, P2 and S2. All Controllers must be flush with the running surface of the hull, highlighted in blue in the examples below.

If any of the Controllers are installed above the running surface of the hull, they will not make contact with the water while at speed and be unable to influence boat motion as intended. See the example below of this type of incorrect installation.