Attention:
The EM Log is part of nautical equipment. The operation belongs to the bridge only.
Summary
The electromagnetic log measures the speed of the vessel through water.
| Manufacturer | Sperry Marine |
|---|---|
| Model | NAVIKNOT 350E |
| Serial No. | n/a |
| Type | speed log |
Contacts
| Name | Institution | Role |
|---|---|---|
| Reederei Briese | Reederei Briese | Engineer In Charge |
Components
The system consists of the EM Log transducer located in the keel and an operational unit on the bridge deck. No subdevices found for this sensor.
Position
| Origin Description: | xyz-position of transducer from Alignment Survey Report RV Heincke (January 2016). Electronics and operation on bridge deck. |
| X: | 45.564 m (Positive X axis is forward and along the centerline of the vessel with X0 at the Stern point of the vessel.) |
| Y: | 0.25 m (Positive Y axis is portside of centerline with Y0 at centerline at the Very stern point of the vessel.) |
| Z: | 0.087 m (Positive Z axis is upwards of basis. Z0 is set to the hydrophone on midship.) |
Data logging, storage and archiving
Logged parameters
| Parameter | Sensor Output Type | Unit |
|---|---|---|
| longitudinal water speed | speed | knots |
| longitudinal ground speed | speed | knots |
Central geographical ship's position and time standard
Time synchronization and geographical positioning is done by DShip receiving the data for logging.
Rawdata storage on board
Data storage in DShip system.
DShip
Uncorrected measurement data.
Device name |
EM Log |
|---|---|
Parameters |
Longitudinal ground speed [kn]; Longitudinal water speed [kn] |
Data archiving on land
After the cruise the DShip data set can be extracted from https://dms.awi.de
.
.