1、 ABSGUIDE FOR THE CLASS NOTATION HELICOPTER DECKS AND FACILITIES (HELIDK AND HELIDK(SRF) .2008 1 GUIDE FOR THE CLASS NOTATION HELICOPTER DECKS AND FACILITIES (HELIDK AND HELIDK(SRF) APRIL 2008 NOTICE NO. 2 June 2012 The following Rule Changes become EFFECTIVE AS OF 1 JUNE 2012. (See http:/www.eagle.
2、org for the consolidated version of the Guide for the Class Notation Helicopter Decks and Facilities (HELIDK and HELIDK(SRF) 2008, with all Notices and Corrigenda incorporated.) Notes - The date in the parentheses means the date that the Rule becomes effective for new construction based on the contr
3、act date for construction. (See 1-1-4/3.3 of the ABS Rules for Conditions of Classification (Part 1).) SECTION 2 STRUCTURAL DESIGN AND SAFETY CRITERIA 5 Helicopter Deck Arrangements 5.1 Size (Revise Subparagraph 2/5.1.1, as follows.) 5.1.2 (15 June 2012) Where adverse climatic conditions are prevale
4、nt for normal helicopter operation, a helicopter deck is to have sufficient size to contain a circle of a diameter at least equal to the overall length of the largest helicopter using the helicopter deck. The approach/departure sector is to be not less than 210 free of obstruction and is to intersec
5、t the periphery of the circle described above, as shown in Section 2, Figure 1. Outside the approach/departure sector, obstructions within one-third of the helicopters overall length from the periphery of the circle described above are not to extend more than 1/20of the helicopter overall length abo
6、ve the level of the helicopter deck. The overall length of a helicopter (D or D-value) is the distance from the tip of the main rotor blade to the tip of the tail rotor when the rotor blades are aligned along the longitudinal axis of the helicopter. 9 Safety 9.5 Visual Aids (Revise Subparagraph 2/9.
7、5.1, as follows.) 9.5.1 General (15 June 2012) Coastal States may have specific requirements and must be incorporated into the design. Those requirements are to be specified and acceptable documentation to verify compliance with those specific requirements is to be submitted to ABS. Where the Coasta
8、l State has no requirements, the following requirements for wind indicator, marking, and lights are to be complied with. Notice No. 2 June 2012 2 ABSGUIDE FOR THE CLASS NOTATION HELICOPTER DECKS AND FACILITIES (HELIDK AND HELIDK(SRF) .2008 (Revise Paragraph 2/9.7, as follows.) 9.7 Markings (15 June
9、2012) 9.7.1 Vessels The flag Administration or the cognizant authority (in which territorial waters the vessel or unit is being operated) may have specific requirements on helicopter deck markings. Those requirements are to be specified and acceptable documentation to verify compliance with those sp
10、ecific requirements is to be submitted to ABS. In the absence of such requirements, the helicopter deck is to be marked in a contrasting color as follows (see also Section 2, Figure 1): i) The perimeter with a continuous line of 400 mm (15.75 in.) in width ii) Vessel identification iii) Aiming circl
11、es in yellow, taking into account deck configuration, helicopter type and operational requirements iv) A white “H” centered on the landing area with the horizontal bar of the “H” on the bisector of the obstacle-free sector. The “H” is to be 3 m (9.85 ft) high, 1.8 m (5.9 ft) wide and 0.4 m (1.3 ft)
12、wide lines. 9.7.2 Mobile Offshore Drilling Units and other Offshore Units Unless specific requirements are provided by the flag Administration or the cognizant authority (in which territorial waters the vessel or unit is being operated), the helicopter deck on MODUs and other offshore units is to be
13、 marked as follows (see also Section 2, Figure 2): i) The perimeter with a continuous white line of at least 0.3 m (1 ft) in width. Perimeter marking for single main rotor helicopters is typically for a 1 D value, where the D-value is the reference diameter as described in 2/5.1.2. ii) Unit identifi
14、cation, positioned between the origin of the obstacle-free sector and aiming circle, with characters not less than 1.2 m (4 ft) in height in a color contrasting with the background. iii) Aiming circles in yellow, taking into account deck configuration, helicopter type and operational requirements. T
15、he inside diameter is to be equal to 0.5 D and the width of the line is to be 1 m (3.3 ft). iv) A white “H” centered on the landing area with the horizontal bar of the “H” on the bisector of the obstacle-free sector. The “H” is to be 4 m (13.15 ft) high, 3 m (9.85 ft) wide and 0.75 m (2.45 ft) wide
16、lines. v) A black chevron positioned in the perimeter marking, each leg being 0.8 m (2.6 ft) long and 0.1 m (4 in.) wide forming an angle that indicates the origin of the obstacle-free sector and the directions of the limits of the sector. vi) The actual D-value of the helicopter deck inboard of the
17、 chevron in alphanumeric symbols of 0.1 m (4 in.) in height. vii) The D-value in the perimeter marking every 90 degrees starting from the chevron, in color contrasting with the helicopter deck (preferably white, but not black or grey for night use). The D-value is to be expressed to the nearest whol
18、e number with 0.5 rounded down (i.e., 18.5 marked as 18). Markings for some helicopters may require special consideration. viii) The maximum allowable mass marking consisting of a two- or three-digit number followed by the letter “t” to indicate the allowable helicopter mass in tonnes (1000 kg) expr
19、essed to one decimal place, rounded to the nearest 100 kg. The marking is to be located in a position which is readable from the preferred final approach direction (i.e., towards the obstacle-free sector origin), and the height of the figures is to be 0.9 m (2.95 ft) with a line width of approximate
20、ly 0.12 m (4.75 in.) and in a color contrasting with the helicopter deck (preferably white, but not black or grey for night use). Where the coastal State requires the marking in pounds, it is to consist of a two- or three-digit number to indicate the maximum allowable mass in thousands of pounds, ro
21、unded to the nearest 1,000 pounds. Notice No. 2 June 2012 ABSGUIDE FOR THE CLASS NOTATION HELICOPTER DECKS AND FACILITIES (HELIDK AND HELIDK(SRF) .2008 3 The helicopter deck is to be painted preferably in dark green color as background to the markings. Markings on aluminum helicopter decks of natura
22、l light grey color are to be enhanced with contrasting colors. (Add new Section 2, Figure 2, as follows.) FIGURE 2 Helicopter Deck Markings (15 June 2012) NAME12.0t2121214 m3 m0.75 m“H” to be painted white0.50D60 cm90 cmChevronMaximum Allowable Massline width 12 cm1 mAiming Circle(yellow)1.2 mPerime
23、ter Line Marking(white)Unit IdentificationD valueObstacle Sector1 m 1 m30 cmObstacle Free Sector 2101515079 cm10 cmPerimeter Line Markingwhiteblack30 cmNotice No. 2 June 2012 4 ABSGUIDE FOR THE CLASS NOTATION HELICOPTER DECKS AND FACILITIES (HELIDK AND HELIDK(SRF) .2008 9.9 Lights (Revise Subparagra
24、ph 2/9.9.1, as follows.) 9.9.1 Perimeter Lights (15 June 2012) 9.9.1(a) Vessels. Each helicopter deck is to be fitted with perimeter lights to the requirements provided by the flag Administration (or the cognizant authority). Those requirements are to be specified and acceptable documentation to ver
25、ify compliance with those specific requirements is to be submitted to ABS. In the absence of such requirements, omni-directional yellow and blue lights, in alternate order, are to be fitted to enable the landing area to be easily identified at night. These lights are to be positioned around the peri
26、meter of the deck not more than 3 m (9-10“) apart. 9.9.1(b) Mobile Offshore Drilling Units and other Offshore Units. The perimeter of the helicopter deck is to be fitted with green lights visible omni-directionally from on or above the landing area. These lights are to be above the level of the deck
27、, but not to exceed 0.25 m (10 in.) in height for helicopter decks sized to a 1 D value. These lights are to be positioned around the perimeter of the deck not more than 3 m (9-10“) apart, coincident with the perimeter line as per 2/9.7.2(i). In the case of square or rectangular decks, at least four
28、 lights are to be fitted along each side, including a light at each corner. Flush fitting lights may be used at the inboard edge of the helicopter deck (150 limited obstacle sector origin) where there is a need to move a helicopter or large equipment off the helicopter deck. SECTION 3 HELICOPTER REF
29、UELING SYSTEMS 1 Steel Vessels (Greater than 90 meters in Length) 1.5 Spill Containment (Revise Subparagraph 3/1.5.2, as follows.) 1.5.2 Drainage (15 June 2012) Arrangements for drainage from within the coaming area are to be as follows. i) Permanent piping and a suitable holding tank are to be fitt
30、ed so that drainage can be either led to the holding tank (for draining oil) or discharged overboard (for draining water) through a three-way valve. No other valve is permitted in the drain piping. ii) The cross sectional area of the drain pipe from the fuel tank coaming is to be twice that of the f
31、uel storage tank outlet pipe. iii) The area within the coaming is to be sloped towards the drain pipe. Where the area within the fuel tank coaming is not provided with drainage arrangements, the height of the coming is to be sufficient to contain the full volume of the fuel storage tank plus 150 mm
32、(6 in.). For drainage of a helicopter deck, see 4-6-4/3.9.2. Notice No. 2 June 2012 ABSGUIDE FOR THE CLASS NOTATION HELICOPTER DECKS AND FACILITIES (HELIDK AND HELIDK(SRF) .2008 5 3 Steel Vessels (Under 90 meters in Length) and Liftboats 3.3 Fuels with Flash Point at or Below 60C (140F) Installation
33、s on an Open Deck (Revise Subparagraph 3/3.3.5, as follows.) 3.3.5 Spill Containment (15 June 2012) To contain spillage and retain fire extinguishing agents, a coaming of at least 150 mm (6 in.) in height is to be provided. The coaming is to surround the fuel storage area, which consists of the fuel
34、 tank, associated piping and any pumping unit adjacent to the storage tank. Where the pumping unit is remote from the tank, a separate coaming is to be provided around the pumping unit. Drainage is to be provided for the area enclosed by the coaming, complying with the following: i) The area within
35、the coaming is to be sloped toward the drain line. ii) Drainage from the area within the coaming is to be led through a valve designed for selective output (e.g., 3-way valve) either to a holding tank complying with 4-4-8/3.3.2 and 4-4-8/3.3.3 above or directly overboard. No other valves may be fitt
36、ed in the drain line. iii) The cross sectional area of the drain line from the fuel tank coaming is to be at least twice that of the fuel storage tank outlet connection. Fuel tank coamings not provided with drainage arrangements in accordance with the above are to be sized to contain the full volume
37、 of the fuel storage tank plus 150 mm (6 in.) of foam. 5 Steel Barges 5.1 Helicopter Fuel Oil Storage and Transfer Facilities (Revise Subparagraph 3/5.1.6, as follows.) 5.1.6 To contain spillage and retain fire extinguishing agents, a coaming at least 150 mm (6 in.) in height is to be provided. The
38、coaming is to surround the fuel storage area, which consists of the fuel tank, associated piping and any pumping unit adjacent to the storage tank. Where the pumping unit is remote from the tank, a separate coaming around the unit is to be provided. A coaming will be required only around the fuel pu
39、mping unit where the installation is such that the fuel storage tank is cantilevered from the barge and arranged to be jettisoned. Drainage is to be provided for the area enclosed by the coaming and complying with the following: i) The area within the coaming is to be sloped toward the drain line. i
40、i) Drainage from the area within the coaming is to be led through a valve designed for selective output (e.g., 3-way valve) either to a holding tank complying with 3/5.1.2 and 3/5.1.3 or directly overboard. No other valves may be fitted in the drain line. iii) The cross-sectional area of the drain l
41、ine from the fuel tank coaming is to be at least twice that of the fuel storage tank outlet connection. Fuel tank coamings not provided with drainage arrangements, in accordance with the above, are to be sized to contain the full volume of the fuel storage tank plus 150 mm (6 in.) of foam. Notice No
42、. 2 June 2012 6 ABSGUIDE FOR THE CLASS NOTATION HELICOPTER DECKS AND FACILITIES (HELIDK AND HELIDK(SRF) .2008 7 Mobile Offshore Drilling Units (Revise Paragraph 3/7.5, as follows.) 7.5 Spill Containment (15 June 2012) To contain spillage and retain fire extinguishing agents, a coaming at least 150 m
43、m (6 in.) in height is to be provided. The coaming is to surround the fuel storage area, which consists of the fuel tank, associated piping and any pumping unit adjacent to the storage tank. Where the pumping unit is remote from the tank, a separate coaming around the unit is to be provided. A coami
44、ng will be required only around the fuel pumping unit where the installation is such that the fuel storage tank is cantilevered from the platform and arranged to be jettisoned. Drainage is to be provided for the area enclosed by the coaming complying with the following: 7.5.1 The area within the coa
45、ming is to be sloped toward the drain line. 7.5.2 Drainage from the area within the coaming is to be led through a valve designed for selective output (e.g., three-way valve) either to a holding tank complying with 3/7.1.2 and 3/7.1.3 or directly overboard. No other valves may be fitted in the drain
46、 line. 7.5.3 The cross sectional area of the drain line from the fuel tank coaming is to be at least twice that of the fuel storage tank outlet connection. Fuel tank coamings not provided with drainage arrangements in accordance with the above are to be sized to contain the full volume of the fuel s
47、torage tank plus 150 mm (6 in.) of foam. SECTION 4 FIRE SAFETY SYSTEMS 5 Mobile Offshore Drilling Units (Revise Paragraph 4/5.1, as follows.) 5.1 General (15 June 2012) Where areas of a unit are designated for helicopter operations, details of the facilities are to be submitted and the firefighting
48、systems of 4/5.3 are to be provided and stored near the access to those areas. Deckhouse tops directly below helicopter decks are to have no openings. See 3/7.3 for helicopter deck drainage. A firefighting system as required by 4/5.3 is to be provided and arranged so as to adequately protect both th
49、e helicopter deck and helicopter fuel storage areas where provided. See 4-2-6/7 of the MODU Rules for the fuel storage requirements. (Combine and revise Paragraphs 4/5.3 and 4/5.5, as follows.) 5.3 Firefighting Systems (15 June 2012) 5.3.1 Hoses and Nozzles At least two approved combination solid stream and water spray nozzles and detachable applicators and hoses sufficient in length to reach any part of the helicopter deck are to be provided. Notice No. 2 June 2012 ABSGUIDE FOR THE CLASS NOTATION HELICOPTER DECKS AND FACILITIES (HELIDK AND HELIDK(SRF) .200
