Retro-reflective materials should be fitted on top of the
gunwale as well as on the outside of the boat as near the gunwale
as possible. The materials should be sufficiently wide and long to
give a minimum area of 150cm2 and should be spaced at suitable
intervals (approximately 80cm from centre to centre). If a canopy
is fitted, it should be allowed to obscure the materials fitted on
the outside of the boat, and the top of the canopy should be fitted
with retro-reflective materials similar to those mentioned above and
spaced at suitable intervals (approximately 80cm from centre to centre).
In the case of partly enclosed or totally enclosed lifeboats, such
materials should be placed as follows:
-
.1 for detection by horizontal light beams - at
suitable intervals at half the height between the gunwale and the
top of the fixed cover; and
-
.2 for detection by vertical light beams (e.g.
from helicopters) - at suitable intervals around the outer portion
of the horizontal (or comparable) part of the top of the fixed cover;
-
.3 retro-reflective materials should also be fitted
on the bottom of lifeboats and rescue boats which are not self-righting.