Lift door indication signals should meet the following:
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.1 the signal showing that 'A' class lift doors
are in the closed position should be activated only when the order
to close the main fire doors has been given by the continuously manned
central control station;
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.2 when there are several lifts giving access
to the same stairway, the lift door indicators located in the continuously
manned central control station should be capable of indicating that
all the lift doors giving access to the same landing are properly
closed. This indication should be shown on the panel; and
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.3 when an order to close the main fire doors
is given, the same order should also stop the lifts from operating
by sending them to a pre-specified deck, to be determined on a case-by-case
basis according to the ship's design. In addition, those inside the
lift should be able to order the lift doors open while those outside
the lift should not be able to do so.