Subpart F - Water aerodromes

139.125 Water aerodrome applicability

(a) This Subpart details the requirements which apply to the certification of water aerodromes in addition to the requirements of Subparts A to E of this OTAR Part.

(b) The operation of a seaplane on the surface of the water shall be subject to the rules and regulations in the relevant maritime, docks authorities and coastguard legislation covering the area of water utilised by the aircraft. The water aerodrome certificate holder shall ensure that all aerodrome operations are compliant with that legislation, where applicable. These requirements shall be detailed in the water aerodrome manual for all applicable water aerodrome operations.

(c) A water aerodrome will be certificated for use by day in VMC only.

139.127 Water aerodrome definitions and units of measurement

(a) In addition to the definitions in OTAR Part 1, the following definitions apply to Subparts F-H:

(1) airside means the area of a water aerodrome consisting of the dockside, of the movement area and its adjacent areas within the aerodrome boundaries, and does not include maintenance of aircraft, or a building and its appurtenances used for the movement of passengers;

(2) airside personnel means persons that are assigned duties on airside that are either employees of the airport operator or those persons employed by aviation organizations that utilize the airport;

(3) dockside means the area that is part of the airport and includes the area(s), on or adjacent to the water, used for the embarkation or disembarkation of passengers; or the aircraft loading or unloading of cargo;

(4) mooring means an arrangement for securing a vessel to a mooring buoy or a pier;

(5) take-off and landing area means the area on the surface of the water that is designated for take-off and landing of aircraft;

(6) underway means that a vessel is not at anchor, made fast to the shore, moored or aground;

(7) vessel means every description of watercraft, including non-displacement craft, WIGE craft and seaplanes, used or capable of being used as a means of transportation on water;

(8) water aerodrome boundary means the movement area and dockside(s) as described in the Water Aerodrome Operations Manual;

(9) water aerodrome elevation means the elevation of the take-off and landing area;

(b) In addition to the requirements for units of measurement in OTAR Part 1, water depths and range of tides or water levels shall be measured and promulgated:

(1) to the nearest foot; or

(2) in metres to the nearest decimal.

139.129 Water aerodrome reference codes

Water aerodromes shall be coded in accordance with Table 139.2 below. Water aerodrome codes W1, W2 and W3 can be equated to Code 1, 2 and 3 noninstrument land aerodromes.

Table 139.2 Water aerodrome reference codes

Manoeuvring Area Code

W1

W2

W3

Aircraft MTWA

<2,730 kg

2,730 – 5,700 kg

>5,700 kg

Strip Length

<800 m

800 – 1,199 m

1,200 m+

Strip Width

60 m

80 m

150 m

Strip End

30 m

60 m

60 m

APPS (10 deg splay)

1:20

1:25

1:30

TOCS

1:20

1:25

1:50

TS

1:5

1:5

1:7

IHS

2,000 m

2,500 m

2,500 m

139.131 Water Aerodrome Reference Point (WARP)

A Water Aerodrome Reference Point (WARP) shall be located at the planned geometric centre of the manoeuvring area or, if there is more than one manoeuvring area, of the main one.

139.133 Water aerodrome elevations

(a) The Water Aerodrome Reference Elevation (WARE) shall be determined at the WARP in accordance with:

(1) lowest normal tide, where there are tides; or

(2) lowest known water level for that body of water.

(3) This elevation shall be determined from the Chart Height, or from the lowest recorded water level, converted to an elevation in metres above Ordnance Datum.

139.135 Water aerodrome dimensions and related information

(a) Where possible, the manoeuvring area shall be large enough to provide a choice of take-off and landing direction, dependent upon prevailing water surface and weather conditions. For the purpose of this OTAR Part, this type of manoeuvring area is termed ‘omnidirectional’.

(b) Where it is not possible to provide an omnidirectional manoeuvring area, such as on a river or narrow lake, a manoeuvring area that caters for take-off and landing in one direction and its reciprocal only, in a direction parallel to the longer sides of the manoeuvring area may be provided. This type of manoeuvring area is termed ‘bi-directional’.

(c) The manoeuvring area(s) shall be square, rectangular or rhomboidal in shape, and shall encompass all parts of the water surface intended for the taking off and landing of seaplanes.

(d) For the purpose of providing the appropriate minimum strip width and obstacle limitation surfaces, manoeuvring areas are coded according to the maximum take-off mass, or performance group, of the largest seaplane likely to operate from the water aerodrome, as shown in Table 1.

(e) Code W1, W2 and W3 manoeuvring areas shall have a minimum width, at any point, equal to the non-instrument strip width for code numbers 1, 2 and 3 land runways respectively, as described in Annex 14 Chapter 3.


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