7.1 The BWMS should be accompanied by sampling facilities as described in
Guidelines on ballast water sampling (G2), so arranged in order to collect
representative samples of the ship's ballast water discharge.
7.2 Suitable bypasses or overrides to protect the safety of the ship and personnel should
be installed and used in the event of an emergency and these should be connected to the
BWMS so that any bypass of the BWMS should activate an alarm. The bypass event should be
recorded by the control and monitoring equipment and within the ballast water record
book.
7.3 The requirement in paragraph 7.2 does not apply to internal transfer of ballast water
within the ship (e.g. anti-heeling operations). For BWMS that transfer water internally
which may affect compliance by the ship with the standard described in regulation D-2
(i.e. circulation or in-tank treatment) the recording in paragraph 7.2 shall identify
such internal transfer operations.