Sperry Marine 5016-CA, Operation, Installaion And Service Manual

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Analogue Compass Repeaters 056376/A
Bearing Repeater 5-1
Chapter 5: Installation
5.1 Bearing Repeater
Installing Bearing Repeater with Bearing Stand
Bearing repeater stands may be positioned amidships (on the fore-and-
aft line) or at the port or starboard sides of the vessel. The position of
the bearing stand(s) is to be chosen that the vessel’s superstructure
does not unduly obstruct the view of the horizon when bearings are
taken. In case one bearing stand does not allow take bearings in a full
circle of 360°, a second bearing stand must be installed for compensa-
tion.
The bearing stand, type 4622, is to be attached to the deck or a pedestal
using four M 20 fasteners. Tubular spacers are provided, which are to be
inserted between the mounting surface and the base of the stand. The
four attachment points are to be located on an imaginary circle of
370 mm diameter, at the 0°, 90°, 180° and 270° positions relative to the
forward direction. The elongated holes in the base of the bearing stand
allow to correct a misalignment of ±3.5° max.
A cable feedthrough is to be located centrally beneath the stand, so that
the connection cable from the compass system runs up the inside of the
stand column.
To install the bearing stand and bearing repeater:
1. Check that the mounting facilities and the cable feedthrough pro-
vided by the shipyard match with the specifications given in dimen-
sion drawing 4622-0112-03 respectively 4622-0112-06.
2. Lay the connecting cable. Make sure that enough cable exits from
the feedthrough to run it up the stand column and through the
grommet to the connection box.
CAUTION Risk of wrong installation
Wrong positioning of the bearing stand will obstruct to take bearings.
Always make sure that the bearing stand is so positioned that the ves-
sel’s superstructure does not unduly obstruct the view of the horizon.
In case one bearing stand does not allow to take bearings in a full circle
of 360°, a second bearing stand must be installed for compensation.
CAUTION Risk of damage
The bearing repeater is a heavy instrument.
To avoid any damage during installation of the bearing repeater into the
gimbal ring, the installation should be carried out by two service persons.
Note The installation of the repeater in the gimbal ring should be carried out
by two service persons.