# The Air Navigation (Overseas Territories) Order 1989, Paragraph 17: Minimum navigation performance specifications-prescribed airspace and navigation performance capability


(1) With reference to Article 36 of this Order the following navigation performances capability is hereby prescribed, that is to say, a capability to ensure that—
(a) the standard deviation of lateral errors in the track of the aircraft is not more than 6.3 nautical miles; and
(b) the proportion of the flight time of the aircraft during which the actual track of the aircraft is 30 nautical miles or more off the track along which it has been given an air traffic control clearance to fly is less than 5.3 × 10−4 to the power of 4; and
(c) the proportion of the flight time of the aircraft during which the actual track of the aircraft is between 50 and 70 nautical miles off the track along which it has been given an air traffic control clearance to fly is less than 13 × 10−5 to the power of 5.
(2) For the purposes of Article 36 of this Order the following airspace is hereby prescribed, that is to say, the airspace from flight level 275 to flight level 400 within the area defined by rhumb lines joining successively the following points—
34 degrees 10'N 17 degrees 48"W
65 degrees 00'N 60 degrees 00"W
36 degrees 30'N 15 degrees 00"W
64 degrees 00'N 63 degrees 00"W
42 degrees 00'N 15 degrees 00"W
61 degrees 00'N 63 degrees 00"W
43 degrees 00'N 13 degrees 00"W
57 degrees 00'N 59 degrees 00"W
45 degrees 00'N 13 degrees 00"W
53 degrees 00'N 54 degrees 00"W
45 degrees 00'N 08 degrees 00"W
49 degrees 00'N 51 degrees 00"W
51 degrees 00'N 08 degrees 00"W
45 degrees 00'N 51 degrees 00"W
51 degrees 00'N 15 degrees 00"W
45 degrees 00'N 53 degrees 00"W
54 degrees 00'N 15 degrees 00"W
43 degrees 36'N 60 degrees 00"W
54 degrees 34'N 10 degrees 00"W
41 degrees 52'N 67 degrees 00"W
61 degrees 00'N 10 degrees 00"W
39 degrees 00'N 67 degrees 00"W
61 degrees 00'N 00 degrees 00"
38 degrees 35'N 68 degrees 53"W
82 degrees 00'N 00 degrees 00"
38 degrees 30'N 69 degrees 15"W
82 degrees 00'N 30 degrees 00"E
38 degrees 30'N 60 degrees 00"W
North Pole
27 degrees 00'N 60 degrees 00"W
82 degrees 00'N 60 degrees 00"W
27 degrees 00'N 25 degrees 00"W
78 degrees 00'N 75 degrees 00"W
30 degrees 00'N 25 degrees 00"W
76 degrees 00'N 76 degrees 00"W
30 degrees 00'N 20 degrees 00"W
65 degrees 00'N 57 degrees 45"W
31 degrees 39'N 17 degrees 25"W;
thence by that part of the arc of a circle radius 100 nautical miles centred on 33 degrees 04'N 16 degrees 21"W to 34 degrees 10'N 17 degrees 48"W.

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Source: https://www.legislation.gov.uk/uksi/1989/2395/schedule/14/paragraph/17 (the official version)
Page: https://openlegislation.uk/air-navigation-overseas-territories-order-1989/schedule-14/paragraph-17
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.