2. TRACK
2.3Track Plotting Interval
The memory stores ship's position in latitude and longitude at a sampling rate set on the OWN SHIP, TARGET PLOT menu. The position data so stored is used to display past own ship's track on the screen. The memory for own ship track and other ship track is 20,000 points each. The plotting interval affects track reconstruction. A shorter interval provides more accurate reconstruction of track, however storage time of the track is reduced. A longer interval stores more track, however the track is less accurate.
The memory for own ship track is 20,000 points. The table below shows the relation between plotting interval and maximum recording time. When the storage capacity is exceeded oldest data is erased to make room of the latest.
Interval | Max. Recording Time | Interval | Max. Recording Time |
10 s | 55 hrs 30 min | 2 min | 27 days 18 hr 40 min |
30 s | 166 hrs 40 min | 3 min | 41 days 16 hr |
1 min | 13 days 21 hrs 20 min | 6 min | 83 days 8 hr |
The memory for other ship’s track is 20,000 points for 10 ships. The table below shows the relation between plotting interval and maximum recording time for each ship. Note that the track of ARPA targets 1 thru 10 may be displayed. The track of ARPA targets 11 thru 30 cannot be displayed.
Interval | Max. Recording Time | Interval | Max. Recording Time |
10 s | 5 hrs 30 min | 2 min | 66 hrs 40 min |
30 s | 16 hrs 40 min | 3 min | 100 hrs |
1 min | 33 hrs 21 min | 6 min | 200 hrs |
2.3.1Choosing track plotting interval
1.Press the [NAV MENU] and [5] keys.
2.To change own ship's track plotting interval, press the [3] key several times to display desired plotting interval in reverse video. The choices are 10, 30 s; 1, 2, 3, 6 min.
3.Press the [ENTER] key.
4.To change other ship's track plotting interval, press the [6] key several times to choose plotting interval.
5.Press the [ENTER] key.
6.Press the [NAV MENU] key to close the menu.
2.3.2Finding track memory used
1.Press the [NAV MENU] and [0] keys. Memory used appears as below.
MEMORY IN USE
OWN SHIP | = 03456 |
TARGET | = 01124 |
MARK | = 00021 |
MEMORY IN USE display
2. Press the [NAV MENU] key to close the menu.
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