User Guide

4. Adjust the tick marks.
• Drag the arrowhead or tail of the ruler to adjust the tick marks along the bearing lines until the
dots line up in the dot stack.
5. Enter the solution
When you have a good trial solution, send it to the Fire Control system by entering the solution.The
solution you enter is now the system firing solution for that contact.The system tracks the
estimated position of the contact based on this solution and uses that estimated location when
targeting the contact.
Seawolf:
• Click ENTER SOLN beneath the TMA Board.
688(I):
• Click ENTER SOLUTION in the TMA Solution Input panel below the TMA board.
Akula:
• Click ENTER SOLUTION below the TMA board.
The system solution displays on the TMA screen in a separate location from the trail solution input
area as described below.
■ Seawolf: The system solution displays in the Firing Solution area of the TMA Data Display on the
right-hand side of the station.
■ 688(I) and Akula: The system solution displays in the TMA Solution panel at the lower right of
the TMA station.
NOTE: The system solution for a contact can be viewed in these locations but they can not be
adjusted there.To update the system solution, adjust the ruler or directly input information in
the trial solution fields and enter the solution again.
TMA ON PASSIVE SONAR AND ESM CONTACTS
As described earlier, a more complex situation arises when only the contact’s bearing is known, as
is the case with passive sonar and ESM. Passive sonar contacts can be assigned trackers but ESM
contacts must be updated manually by repeatedly marking the contact at the ESM Station.
Because you must be at periscope depth to use ESM and your mast can be detected by enemy
radar, you are at greater risk when you use this sensor.
Contacts detected by a UUV in passive sonar mode are displayed from the location of the UUV on
the TMA board and in the Nav and Fire Control maps.
To perform TMA on passive sonar contacts:
1. Select a contact to analyze.A bearing line or lines appear on the TMA Board.
Seawolf:
• Click SELECT TRACKS in the button matrix. (If no contacts have been designated, the second level
of matrix buttons is not revealed.)
• From the
Select drop-down list, select the desired Contact ID.
• Press
BACK to return to the main button matrix.
688(I) and Akula:
• Click the Selected Tracks drop-down list and select the desired Contact ID. No contacts appear in
the drop-down lists if no contacts have been designated. Return to a sensor and mark a contact
or assign a tracker.
2. Adjust your view of Ownship, the bearing lines, and the ruler.
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