Installation manual

Introduction
1
851--160116 / B
1 INSTALLATION PLANNING
Note ! For installation in an already installed trunk system, first read through
chapter 1.3 about the sonar room requirements. Then, for an already
installed SL or SX trunk system, continue to procedure 3 Installation
of the Hull Unit .
For installation in an already installed SK, SB or SQ trunk system,
refer to section Trunk systems in this manual.
1.1 General
This chapter provides the necessary information for the ship
designer to plan and carry out the installation of the SD 570/SE
570 hull system according to Simrad’s requirements. Study this
chapter thoroughly to achieve the recommended knowledge of
the procedures.
Note that individual installation drawings must be designed by
the shipyard, and the construction must be approved by the
classification authorities at the customer’s expense.
Simrad offers free advice for installation planning. The proposal
for the arrangement may be sent to Simrad for comments, or may
be worked out by Simrad. If such assistance is required, the
following drawings should be submitted:
· General arrangement
· Body plan and drawings of bottom tanks and cofferdam
· Sheer drawing
1.2 Location of the Hull Unit
The Hull Unit should preferably be located within 1/10 to 1/3 of
the ship’s length between perpendiculars (LBP), measured from
the fore perpendicular (FP). Refer to figure 1. Larger deviations
from this rule should not be made without consulting Simrad.
The Hull Unit may be located symmetrically on the centre line of
the vessel, or alongside the keel. When determining the exact
location, make sure that the transducer will have free view under
the keel (refer to figure 1).
The Hull Unit trunk must be installed such that it will be vertical
under normal operating conditions.
Water inlets and protruding details which create turbulence,
should not be located in front of the transducer. For the same
reason, check that the shell plating in front of the trunk is not
damaged.