4.1.1 The following model instrumentation should
be provided as a minimum: one relative water level sensor located
in front of the opening at the port and starboard extremities of the
opening (i.e. 2 sensors).
4.1.2 If the water volume is to be estimated using water
height measurements, 15 water level sensors should be used at the following locations
(where l = the length of the floodable vehicle space):
-
.1 at 10% of l from the bow loading
opening, at the watertight boundary on the port and starboard sides and centreline
(h
FP, h
FS and h
FC respectively);
-
.2 at 30% of l from the bow loading
opening, at the watertight boundary on the port and starboard sides and centreline
(h
FMP, h
FMS and h
FMC respectively);
-
.3 at 50% of l from the bow loading
opening, at the watertight boundary on the port and starboard sides and centreline
(h
MP, h
MS and h
MC respectively);
-
.4 at 30% of l from the aft limit of
the vehicle space, at the watertight boundary on the port and starboard sides and
centreline (h
AMP, h
AMS and h
AMC respectively); and
-
.5 at 10% of l from the aft limit of
the vehicle space, at the watertight boundary on the port and starboard sides and
centreline (h
AP, h
AS and h
AC respectively).
4.1.3 A drawing of the positions of the water
height sensors should be provided.
4.1.4 Instrumentation to measure roll and pitch
angles and heave motion is recommended.
4.1.5 If the testing is conducted solely to demonstrate
that water does not reach the bow loading opening, then all items
except 4.1.1 may be omitted.
4.1.6 As an alternative to the use of water level
sensors described in 4.1.2 above, the volume of water accumulated
during a test run may be determined by direct collection and weighing
of the water inside the model.