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11.2.4 Installation / Helideck Identification
11.2.4.1 General
The primary objective is to provide highly visible installation / vessel identification from the air during a helicopter’s final approach (by day and night) and thus minimise the opportunity for ‘wrong deck’ landings [Ref: 32].
There is no requirement under aviation regulations that stipulates the use of block numbers or other designators. This is solely a marine requirement that comes under the jurisdiction of the Maritime and Coastguard Agency in the form of a ‘Marking Schedule’ that was previously issued by the Department of Trade, Marine Division. These marine requirements still exist but do not have relevance to offshore helicopter operations. Therefore, installation side signage should be unambiguous and unique and should be located high up on the installation.
For helicopter operations, ONLY the name should be used to identify the installation / vessel, and this should be consistent with the installation / vessel Identification Boards. Ideally, designers should consider locating installation / vessel name boards at high elevations where they will be more visible to an approaching helicopter at a reasonable range from the installation / vessel.
Company logos and block numbers should NOT be used on helidecks and side signage so that opportunities for confusion are reduced.
11.2.4.2 Helideck
The NAME should ideally be clearly displayed between the origin of the obstacle free sector and the touchdown marking. The identification NAME, should be the same as the installation or vessel AVIATION CALL SIGN and ideally this should be reproduced on the side identification panels.
The identification marking letters / figures should clearly contrast with the background colour of the helideck surface. For greater effect, the white markings can be outlined in a contrasting colour (e.g. black) if it is necessary to highlight them against the helideck ‘base’ colour.
Particularly, this may need to be done on aluminium helidecks where the natural surface remains unpainted. Also, on ‘passive’ design helidecks, the perforated surface will rarely provided sufficient contrast without highlighting all the markings.
CAP 437 states a MINIMUM height of 1.2 metres for the identification marking letters / figures. Where space permits, consideration should be given to enlarging the markings to a height of 2.0 metres with a line width of 0.4 metres.
It is essential to ensure the helideck net (when fitted) does not obscure any part of the identification NAME.
11.2.4.3 Installation Identification Boards
It should be recognised that the retro-reflective systems currently used for installation identification boards do not provide adequate long-range identification for pilots, particularly at night and in poor visibility. The use of advanced lighting technologies (i.e. high intensity, long life LEDs - Section 11.3.3.4) should be considered for installation identification boards in order to enhance long range identification for pilots and mariners. See CAA Paper 92006 [Ref: 45].
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离岸直升机起落甲板设计指南 OFFSHORE HELIDECK DESIGN GUIDELINES 2(35)
