Specifications

BATS AND PORTABLE BATS INSTALLATION
2-12
2.1.3 4213C-B SUGGESTED MTG FOR SEALED SHAFT INSTALLATION
The Model 4213C Hydrophone can also be installed through a hull mounted gate valve. The hydro-
phone is first installed in a mounting staff and the mounting staff is projected through a gate valve.
This allows for ease of deployment, recovery and maintenance of the hydrophone. Figure 2-7
(4213CM0053) shows the suggested machining dimensions necessary for mounting the hydro-
phone to an extension shaft (Flanged). An example of a gate valve type mounting arrangement for
Hydrophone installation is shown in Figure 2-8 (4630CM0154). A complete installation is shown in
Figure 2-9. For information on the Model 4630D Motorized Gate Valve System contact EdgeTech.
NOTE: The slot opposite the “BOW” alignment mark in the staff is for the AFT alignment pin.
The hydrophone extension shaft must extend the hydrophone far enough from the nearest reflec-
tor, allowing the direct arrival of a signal from the acoustic source before a reflected signal arrives.
This distance is a minimum of 1 meter. It is also important to keep the hydrophone below the level
of the ship's keel for good 360 degree coverage.
When designing the hydrophone mount/deployment system keep in mind that the shaft be keyed
to allow a repeatable bearing orientation. This ensures that the bow reference always returns to
the same fixed position when the hydrophone is deployed.
The gate valve/mounting staff assembly should be installed in as close to a vertical position as pos-
sible.
The hydrophone mount can be installed offset from the centerline of the vessel. An X and Y offset
can be input to the PC to correct for these offsets. Refer to section 2.4.
The Deck Cable mates to the Hydrophone by lining up the pins in both connectors and pushing to-
gether. The mated connection is then held together with the locking sleeves. The following are
guidelines from the manufacturer.
 Align indexes on connectors and mate with minimum twisting and flexing
 Care must be taken not to damage contacts in unmated connectors
 Contact surfaces must be dry prior to mating.
 Lubricate mating surfaces with 3M Silicone Spray or equivalent* (see caution below). DO
NOT GREASE. Connectors must be lubricated on a regular basis.
 Avoid contact with solvents.
 Grip main body of connector during mating or unmating. Do not pull on the cable to discon-
nect.
 Avoid sharp bends at cable entry to connector.