Attention:
The EM-Log is operated by ship's command only.
Summary
The electromagnetic log measures the speed of the vessel through water.
| Manufacturer | SAGEM |
|---|---|
| Model | LHS |
| Serial No. | n/a |
| Type | speed log |
| SENSOR-Link | ↪ |
Contacts
| Name | Institution | Role |
|---|---|---|
| Reederei Laeisz | F. Laeisz | Engineer In Charge |
Components
The system consists of the EM Log transducer located in box keel, the EM Log electronics box (G707) and the EM Log display on the bridge.
Position
| Info | xyz-position of transducer from Alignment Survey Report RV Polarstern (June 2016), transducer located in box keel, electronics located on G-deck room G707, display located on bridge |
| X | 78.99 m (X-0 is at the center of der rudder (ref. design drawing of the vessel), positive X-axis is forward and along vessel centerline) |
| Y | -0.502 m (Y-0 at centerline, positive Y-axis is portside) |
| Z | 0.022 m (Z-0 is set to the lowest point of the keel, positive Z-axis is upwards) |
Data logging, storage and archiving
Logged parameters
| Parameter | Sensor Output Type | Unit |
|---|---|---|
| speed | speed | knots |
Central geographical ship's position and time standard
Time synchronising via DShip.
Geographical ship's position via DShip.
Geographical ship's position via DShip.
Rawdata storage on board
Data storage in DShip system.
Dship
Uncorrected measurement data.
Device name |
EM-Log |
|---|---|
Parameters |
speed [kn] |
Data archiving on land
After the cruise the DShip data set can be extracted from https://dship.awi.de/
.
.File format(s) |
*.txt |
|---|---|
Calibration certificates |
NO |