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

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056376/A Analogue Compass Repeaters
5-2 Bearing Repeater
3. If the mounting surface is furnished with tapped holes, place the
tubular spacers over the holes. If welded studs are provided, slide
the spacers onto the studs.
4. Place the bearing stand on top of the spacers. The stand may be
mounted in any of the four possible orientations. Make sure, how-
ever, that the connection box is easily accessible.
5. Loosely attach the bearing stand to the mounting surface with the
fasteners provided by the shipyard. Use washers. Do not yet tighten
the fasteners.
6. Remove the grommet from the cable exit in the stand column.
7. Run the connection cable up the stand column and through the exit
to the outside of the stand.
8. Loosen one of the lock nuts securing the trunnions in the gimbal ring
and screw back the trunnion by approximately 2 cm.
9. Hold the repeater in a convenient position close to the bearing stand.
Unwind the repeater connection cable and run it through the gimbal
ring, the stand column and the cable exit to the outside of the stand.
10. Lift the bearing repeater into the gimbal ring so that the lubber line
points in the forward direction.
11. Locate the fixed trunnion in the bushing in the repeater.
12. Turn the loosened trunnion clockwise into the opposite bushing, so
that the repeater is secured without play in the gimbal ring.
Make sure that the repeater swings freely in the gimbal ring without
jamming.
13. Check that the repeater is centered in the gimbal ring. If necessary,
adjust the trunnions to center the repeater.
14. Carefully tighten the trunnion lock nuts until they are just free of
clearance.
15. Align the bearing stand with the vessel’s fore-and-aft line as follows:
a) Determine the exact lateral distance between the stand’s centre
and the vessel’s fore-and-aft line.
b) Position a beam with a perpendicular reference mark well for-
ward of the bearing stand, at the same lateral distance from the
fore-and-aft line.
c) Fit a PV 23 azimuth device to the bearing repeater.
d) Take a bearing of the reference mark on the beam.
The bearing is to be 360° exactly. If necessary, gently rotate the
bearing stand until a bearing of 360° is obtained.
e) Position a second beam well aft of the bearing stand.
f) Take a bearing of the reference mark on the beam.
Check that the bearing is 180° exactly. If necessary, correct any
misalignment by rotating the bearing stand, then re-check the
bearings of the two beams.
16. Tighten the fasteners on the repeater stand base.
Note In case the bearing stand is mounted amidships (on the fore-and-aft line),
no beams need to be erected if bearings can be taken of objects on the
fore-and-aft line, e.g. the centre of the foremast, flagstaff etc.