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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 Reederei 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

Infoxyz-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
X78.99 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)
Z0.022 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.

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://dms.awi.de.

File format(s)

*.txt

Calibration certificates

NO

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