[Jamie]

From the DW manual... For anyone who is interested:

Using DEMON to Calculate a Contact’s Speed

• 1. First determine the class of the contact in the Narrowband, ESM or the Stadimeter Station. In the USNI Browser, find the entry for the ship or sub’s class and make note of the turns per knot number listed in the TPK field.
  
  2. Ensure that there is a tracker assigned to the desired contact in Broadband sonar.
  
  3. Click SELECT ARRAY. A panel containing array buttons appears. Select the TOWED or SPHERE array. The selected button is green. Click BACK.
  
  4. Click TRACKER REVIEW until the Contact ID and tracker letter for the contact you want to analyze appear in the DEMON Data Display. Lines appear in the DEMON Waterfall Display
  Note: If the game is paused, no lines appear in the waterfall display.
  
  5. If necessary, adjust the frequency to better view the signal. If the lines in the display seem to blur together, switch to a lower frequency range. If the lines run off the right edge of the display, increase the frequency range.
  To adjust the frequency range, click FREQUENCY SCALE in the button matrix. A panel with frequency options appears. Click the desired scale. Click BACK.
  
  6. Click above the line farthest left in the Waterfall display to select it. A vertical line above the contact indicates the line is selected.
  
  7. Click TURNS PER KNOT in the button matrix.
  
  8. In the panel that appears, click either INCREASE T.P.K. or DECREASE T.P.K. as necessary to set the desired TPK value. The TPK value entered is seen in the Data Display in the Turns Per Knot field. The speed for the designated TPK is displayed in the Speed field in the Data Display.
  
  9. When you have determined the speed of the contact, enter that speed in the TMA SPEED field for the selected contact on the TMA Station.