Clasification Society Rulefinder 2020 - Version 9.33 - Fix
Statutory Documents - MCA Publications - LY3 - The Large Commercial Yacht Code - Annex 6 Technical Standard for Helicopter Landing Areas - Section 3 - Helicopter Landing Areas - Physical Characteristics - 1.0 General

1.0 General

  1.1 This chapter outlines physical requirements for the characteristics of helicopter landing areas on large yachts. As part of the verification of landing area compliance, it should be stated for each helicopter landing area the maximum size of helicopter in terms of D-value and the maximum take-off weight of the heaviest helicopter in terms of “t” value for which each landing area is certificated with regard to size and strength. The following plans and particulars should be submitted to the Aviation Inspection Body, Certifying Authority and Administration (as appropriate) for approval:

  • .1 Hangar general arrangement (showing dimensions and structural considerations).

  • .2 Helicopter lift and movement arrangements (if appropriate).

  • .3 Structural fire protection.

  • .4 Fire detection and extinguishing arrangements.

  1.2 The criteria which follow are based on helicopter size and weight. This data is summarised in Table 1 below. Where skid fitted helicopters are used routinely, landing nets are not recommended.

Table 1 D-Value and Helicopter Type Criteria (Not exhaustive)

Type D value
(m) 		Perimeter
'D'
marking 		Rotor
diameter
(m) 		Max
weight
(kg) 		't'
value 		Landing
net size
Eurocopter EC120 11.52 12 10.00 1715 1.7 Not required
Bell 206 B3 11.96 12 10.16 1451/1519 1.5 Not required
Bell 206 L4 12.91 13 11.28 2018 2.0 Not required
Bell 407 12.61 13 10.66 2268 2.3 Not required
Eurocopter EC130 12.64 13 10.69 2400 2.4 Not required
Eurocopter AS350B3 12.94 13 10.69 2250 2.3 Not required
Eurocopter AS355 12.94 13 10.69 2600 2.6 Not required
Eurocopter EC135 12.10 12 10.20 2720 2.7 Not required
Agusta A119 13.02 13 10.83 2720 2.7 Not required
Bell 427 13.00 13 11.28 2971 3.0 Not required
Eurocopter EC145 13.03 13 11.00 3585 3.6 Not required
Agusta A109 13.04 13 11.00 2850 2.9 Small
Agusta Grand 12.96 13 10.83 3175 3.2 Small
Eurocopter AS365 N3 13.73 14 11.94 4300 4.3 Small
Eurocopter EC155 B1 14.30 14 12.60 4920 4.9 Medium
Bell 430 15.29 15 12.80 4218 4.2 Medium
Sikorsky S76 16.00 16 13.40 5318 5.3 Medium
Agusta Westland 139 16.66 17 13.80 6400 6.4 Medium
Bell 412 17.10 17 14.02 5398 5.4 Not required
Parent topic: Section 3 - Helicopter Landing Areas - Physical Characteristics
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