Turning Maggie ON:
ACTION | SYMBOL | RESULT |
Call the Bridge (200) and ECR (290) and tell them you are deploying the maggie | Get the OK to before proceeding | |
Connect cable to towfish | Towfish is connected in a secure place on the fantail | |
Turn on power to isolation transceiver |
| Blue light flickers and goes off then solid green light |
Launch SeaLINK software on the opposite computer that the Winfrog software is running |
| Ignore Repeat Functionality Disabled error for now. Okay through any Sync messages. |
Power up (Ctrl-O) (May turn off if already on) |
| Command window will read: Power ON |
| Command window will read: ‘Towfish not synced’ in first line followed by ‘Setting Towfish time’ and finally ‘Towfish time was set’ | |
| This will display your output parameters in the command window and should read close to these values. (Between 013-015mA, and 00.6-00.8W is acceptable). Output 47.6V, 014mA, 00.6W ‘ S:006 B:+47.9V T:+022.3C D:+000.4m
| |
| | Data logging status will now be OFF |
Stop magnetometer cycling by clicking ‘Stop cycling of Mag’ icon |
| Command window will read: Cycling off |
Check NMEA GPS data is coming in from Winfrog | NMEA Window is on bottom left just below command window | Window will be scrolling as new GPS info is being received from Winfrog software. If not receiving GPS continuously refer to Winfrog guide on connecting I/O devices through COM ports or ask LO/Underway Tech to help connect)
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Get the towfish in the water, just below the water line | Towfish is just far enough out to be stable in the water. | |
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| Command window will ask ‘zero pressure Y/N’. Press Y and command window will read: ‘Zero pressure is * mV’ |
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| Towfish is now at its full towed length. Refer to Maggie User Guide if unsure where to stop the spool. |
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| Command window will read: ‘Time set - *current date and time* followed by ‘Setting towfish Time…’ |
Enter layback length (0m) True layback offset is set in WinFrog, the GPS data coming into SeaLINK will already have this offset applied. |
| Command window will read: ‘Layback length changes from *.* to 0.0 (m)’ |
Sync GPS with towfish |
| Be patient until you receive ‘Synchronization failed’ error. Click ‘Okay’ (Unsure if this step is neces |
Click ‘Appending GPS position to Fish output’ icon | | GPS Tagging status should now be ON |
Turn on Auto tuning |
| Command window will read: ‘Auto tuning on’ |
Create a new logging file with ‘Start logging on a new SeaLINK file’ icon. |
| New file will be created automatically in C:\Exp Mag Data\EXP#
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Cycle at 0.3Hz by selecting 0.3Hz icon |
| Command window will read: ‘Cycling at 0.3Hz’ |
Start logging data with ‘Toggle SeaLINK File Logging’ icon |
| Data Logging status will now be ON
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Check signal status indicators | Status readouts located above command window | Should have NO RED indicators, YELLOW is acceptable, GREY is good |
Call the Bridge (200) and tell them maggie is deployed |
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Go to LO office and connect monitor to the Winfrog computer running SeaLINK software |
| Maggie can now be monitored from LO office.
Done! |
Turning Maggie OFF:
- Stop data cycling (STOP icon)
- Stop data logging (press LOG icon)
- Turn off power to towfish (CTRL-O letter, not number)
- Disconnect power to isolation transceiver (on/off switch next to blue box)
- Retrieve towfish being careful to spool the line neatly
- Spray incoming cable with fresh water and rinse towfish with fresh water on deck.
- Dry the brass cable and towfish connector (nose) with air. Lightly coat the brass connectors with WD-40.
- Remember to spray pressure sensor port with air.
- Let bridge (200) and ECR (290) know the magnetometer has been retrieved.
