B. If the flow through method
is used, caution should
be exercised, since:
.1
air pipes are not designed
for continuous ballast
water overflow;
.2
current research indicates
that pumping of at least
three full volumes
of the tank capacity
could be needed to be
effective when filling
clean water from the
bottom and overflowing
from the top; and
.3
certain watertight and
weathertight closures
(e.g. manholes) which
may be opened during
ballast exchange, should
be re-secured.
No proposed amendments
Part B, Section 2.C
C. The ballast water management
plan shall
include a list of circumstances
in which ballast
water exchange should not be
undertaken. These
circumstances may result from
critical situations of
an exceptional nature, force
majeure due to stress of
weather, or any other circumstances
in which human
life or safety of the ship is
threatened.
