Marine Order 21, issue 8
Sch 7Indicator system for a closing appliance
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Schedule 7 Indicator system for a closing appliance
(paragraph 67.1(a))
1 Visual indicators
1.1 The indicator system must include the number of visual indicator sets necessary to ensure that:
(a) a set is located in the navigation area of the ship and is clearly visible to the person navigating the ship; and
(b) a set is located near the controls for operating the closing appliance and is clearly visible to the person operating the closing appliance; and
(c) if the securing mechanism for a closing appliance is power operated, a set is located near the power controls for operating the securing device and is clearly visible to the person operating the controls.
Note For additional requirements for passenger ships with ro‑ro cargo spaces or special category spaces — see Regulation 23.2 of Chapter II-1 of SOLAS.
1.2 Each set of visual indicators must:
(a) have at least 2 indicators; and
(b) be clearly and permanently labelled indicating:
(i) the closing appliance to which it relates; and
(ii) the indicator that operates when the closing appliance is ‘closed and secured’; and
(iii) the indicator that operates when the closing appliance is ‘unsecured’.
1.3 The visual indicator indicating when a closing appliance is ‘closed and secured’ must only operate when the closing appliance is closed and secured.
1.4 The indicator indicating when a closing appliance is ‘unsecured’ must only operate when the closing appliance is:
(a) open; or
(b) closed but not secured.
1.5 If a set of visual indicators consists of electric lamps, the lamps must be:
(a) incapable of being dimmed to a level so that they are ineffective; and
(b) incapable of being extinguished independently of the indicator system.
2 Aural alarms
2.1 The indicator system must have an aural alarm near each set of visual indicators.
2.2 If at least 2 sets of visual indicators for at least 1 closing appliance are next to each other then only 1 aural alarm is required.
2.3 An aural alarm must be incapable of being isolated from the indicator system.
2.4 An aural alarm must automatically sound if the closing appliance it is for opens.
2.5 The alarm must continue sounding until:
(a) the closing appliance to which it relates is closed and secured; or
(b) it is manually turned off.
2.6 If a ship is being prepared for or is engaged on a voyage, any aural alarm must be clearly audible above the maximum sound level for the part of the ship it is in.