Lodestar Hardware
Manual
Document Ref: UM-8084-101
Issue: A– Rev 8
© Sonardyne International Limited 2013
27
5.4 Site preparation
You can install the Lodestar AHRS with any convenient orientation with respect to
the vessel’s body frame. You can compensate for any misalignment between the
Lodestar and the vessel by carefully measuring the mounting angles and entering
them in software.
The site preparations you make before you install the Lodestar are important. The
alignment of the Lodestar to the vehicle is discussed in section 5.5 and in depth in
the Lodestar AHRS Operation Manual UM 8084-107.
Figure 8 and Figure 9 show the mounting arrangement for the surface and the
subsea version of the Lodestar.
The surface version uses three M8 stainless steel socket cap head bolts and
washers to secure the Lodestar to the mounting location. Sonardyne does not
supply these fixing bolts.
You can use a similar mounting plate to secure the subsea version of the Lodestar,
or you can use strong stainless steel straps and protective rubber strips to secure
the Lodestar to a convenient location on the ROV frame. Sonardyne does not
supply the fixings for these methods.
Whichever mounting method you use, prepare the location carefully to achieve
coarse alignment between the Lodestar and the vehicle. See “Coarse alignment”
on page 29 for information. Make sure the mounting holes are clear of
swarf.
CAUTION
Take care to protect the Lodestar’s surface finish against
scratches or damage. If you damage the surface finish on the
Lodestar’s outer casing, corrosion can occur.
