Mounting method
A typical mounting method is shown in the outline drawing at the back of this manual. Consult ship’s owner, dockyard and user to determine appropriate mount- ing method. Pay attention to safety (strength, watertighness) first, followed by ease of maintenance and inspection.
Tank length
Shorten the transducer tank so the trans- ducer is lowered into water as deep as pos- sible.
Pay particular attention to the tank length Lt. Determine the length of the main shaft as described in the paragraph “Assembling and mounting of hull unit.”
Note 1: Do not shorten the 1 meter retrac- tion tank. Shortening it may also necessitate shortening of the top part of the main shaft, thereby destroying the watertight construc- tion of the 1.17 meter shaft.
Note 2: When the retraction tank is con- structed locally, finish it so that welding beads do not protrude on the inner surface of the tank. The tank guide will hit the bead, burn- ing out the raise/lower motor. Also, do not position the welding bead in the ship’s fore- aft line.
Note 3: Use of other manufacturer’s tank is permitted. However, the dimensions should be the same as those in the transducer tank outline drawing.
Cable gland
Washer
Gasket
Main shaft (1.17 m)
Welding bead
Welding bead
Figure 1-1 Transducer tank length and welding bead
Mounting of transducer tank
Install the transducer tank referring to the hull unit outline drawings at the back of this manual.
Note: Locate one of the bolt holes 10° to port to minimize mechanical shock at the raise/ lower block during pitching and rolling.
10°