Regulation 2.21 – Definition of the term "Lightweight"
1 The weight of mediums on board for the fixed fire-fighting systems (e.g. freshwater,
CO2, dry chemical powder, foam concentrate, etc.) should be included in the
lightweight and lightship condition.
Regulation 3-2 – Protective coatings of dedicated seawater ballast tanks in all types of
ships and double-side skin spaces of bulk carriers
2 The following tanks should not be considered to be dedicated seawater ballast
tanks and should, therefore, be exempted from the application and requirements of the
Performance standard for protective coatings for dedicated seawater ballast tanks in
all types of ships and double-side skin spaces of bulk carriers (resolution
MSC.215(82)), provided the coatings applied in the tanks described in
sub-paragraphs .2 and .3 below are confirmed by the coating manufacturer to be resistant to
the media stored in these tanks and provided such coatings are applied and maintained
according to the coating manufacturer's procedures.
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.1 ballast tanks identified as "Spaces included in Net Tonnage" in the International
Tonnage Certificate (1969);
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.2 seawater ballast tanks in passenger ships also designated for the carriage of grey
water or black water; and
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.3 seawater ballast tanks in livestock carriers also designated for the carriage of
livestock dung.
Regulation 7-2 – Calculation of the factor si
3 In applying θv, openings which cannot be or are incapable of
being closed weathertight include ventilators (complying with regulation 19(4) of the
International Convention on
Load Lines, 1966) that for operational reasons have to remain open to
supply air to the engine-room, emergency generator room or closed ro-ro and vehicle spaces
(if the same is considered buoyant in the stability calculation or protecting openings
leading below) for the effective operation of the ship. Where it is not technically
feasible to treat some closed ro-ro and vehicle space ventilators as unprotected openings,
Administrations may allow an alternative arrangement that provides an equivalent level of
safety.
Regulation II-1/22-1 – Flooding detection systems for passenger ships carrying 36 or
more persons constructed on or after 1 July 2010footnote
"A flooding detection system for watertight spaces below the bulkhead deck shall be
provided based on the guidelines developed by the Organization.footnote
Regulation II-2/21.4 – Safe return to portfootnote
"When fire damage does not exceed the casualty threshold indicated in paragraph 3, the ship
shall be capable of returning to port while providing a safe area as defined in regulation
3. To be deemed capable of returning to port, the following systems shall remain
operational in the remaining part of the ship not affected by fire:
(…)
.13 flooding detection systems; and (...)
Guidelines for flooding detection systems on passenger ships (MSC.1/Circ.1291)
"7 Any watertight spaces that are separately equipped with a liquid level monitoring system
(such as fresh water, ballast water, fuel, etc.), with an indicator panel or other means of
monitoring at the navigation bridge (and the safety centre if located in a separate space
from the navigation bridge), are excluded from these requirements."
Interpretation
For passenger ships carrying 36 or more persons and subject to SOLAS regulation II-1/8-1, the Safe Return To Port (SRTP)
requirements of SOLAS regulation II-2/21.4 apply to both:
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.1 the flooding detection systems in the spaces as defined in paragraph 6 of MSC.1/Circ.1291; and
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.2 the liquid level monitoring systems, which are used as, or replace, the flooding
detection systems, as specified in paragraph 7 of MSC.1/Circ.1291.
Therefore, for systems noted in sub-paragraph .2 above, the phrase "excluded from these
requirements" in paragraph 7 of MSC.1/Circ.1291 is not an exclusion from the general provision in SOLAS
regulation II-2/21.4.13 (remain operational in the event of
fire). This exclusion pertains only to the detailed provisions in MSC.1/Circ.1291.