SeaLINK Cheatsheet

Turning Maggie ON:

Call the Bridge (200) and ECR (290) to get the OK before proceeding with the following steps!

1. Connect cable to towfish (apply DC111 to cable connector o-rings periodically)
2. Turn on power to isolation transceiver (on/off switch next to blue box above the Bathy)
3. Launch SeaLINK software
4. Check communication with towfish by typing in the terminal command display:

Power up (Ctrl-O)

Test by pressing spacebar to acquire time (2 times)

Enter ‘d’ command in terminal window for parameter confirmation

1. Check GPS data is coming in from WinFrog – NMEA/GPS  window
2. Get the towfish in the water, just below the water line
3. After 15 minutes to equilibrate pressure and temp, zero pressure sensor

(‘p’ command or Zero Pressure icon)

1. Spool out the cable
2. Sync time source (press F7 or click PC Time icon)
3. Enter layback length (0m) layback is set in WinFrog
4. Sync GPS with towfish (press F8  key or click Sync GPS icon)
5. Click ‘Appending GPS position to Fish output’ icon
6.  Turn on Auto tuning (enter ‘x’ in terminal window or click the tuning fork icon)
7. Cycle at 0.3Hz
8. Check signal indicators
9. Start logging files with ‘SeaLINK Logging’ icon
10. Call Bridge. Tell them it is deployed.

Turning Maggie OFF:

1. Stop data cycling (STOP icon)
2. Stop data logging (press LOG icon)
3. Turn off power to towfish (CTRL-O letter, not number)
4. Disconnect power to isolation transceiver (on/off switch next to blue box)
5. Retrieve towfish and clean/store appropriately.  .
   1. Spray incoming cable with fresh water and rinse towfish with fresh water on deck
   2. Dry the brass cable and towfish connector (nose) with air. Lightly coat the brass connectors with WD40.
   3. Remember to spray pressure sensor port with air.
   4. Let Bridge (200) and ECR (290) know the magnetometer has been retrieved.