NAV 44/7/4
10.4.10 It should be possible to display:
.1 time-labels along ships track manually
on demand and automatically at intervals selected between
1 and 120 minutes; and
.2 an adequate number of: points, free
movable electronic bearing lines, variable and fixed
range markers and other symbols required for navigation
purposes and specified in Appendix 1.
10.4.11 It should be possible to enter the
geoagraphical co-ordinates of any position and then display
that position on demand. Also, it should be possible to
select any point (features, symbol or position) on the
display and read its geographical co-ordinates on demand.
10.4.12 It should be possible to adjust the
ship's geographic position manually. This manual adjustment
should be noted alpha-numerically on the screen, maintained
until altered by the mariner and automatically recorded.
10.4.13 It should be possible to activate an
automatic alarm when the ship crosses a point, line, or is
within the boundary of a mariner-entered feature within a
specified time or distance.
10.5 Voyage recording
10.5.1 RCDS should store and be able to
reproduce certain minimum elements required to reconstruct
the navigation and verify the official database used during
the previous 12 hours. The following data shall be recorded
at one minute intervals:
.1 to ensure a record of own ship's past
track; time, position, heading, and speed; and
.2 to ensure
a record of official data used; RNC, edition, date and
update history.
10.5.2 In addition, RCDS should record
the complete track for the entire voyage, with time marks at
intervals not exceeding 4 hours.
10.5.3 It should not be possible to
remove, delete, or change the recorded information
l0.5.4 RCDS should have a capability to
preserve the record of the previous 12 hours and of the
voyage track.
11. ACCURACY
11.1 The accuracy of all calculations
performed by RCDS should be independent of the
characteristics of the output device and should be consistent
with SRNCD accuracy.
11.2 Bearings and distances drawn on the display or
those measured between features already drawn on the display
should have an accuracy no less than that afforded by the
resolution of the display.
12. CONNECTIONS WITH OTHER EQUIPMENT
12.1 RCDS should not degrade the
performance of any equipment providing sensor inputs. Nor
should the connection of optional equipment degrade the
performance of RCDS below these standards.
I:/NAV/44/7-4.WPD
