The Doppler Log (DO Log) is part of nautical equipment. The operation belongs to the bridge only.

Summary

The Doppler log measures speed through water by using the Doppler effect of sound signal reflected from the seafloor or from suspended matter in the water column. Wärtsilä SAM 4682 transducer consists of a total of 3 hydro-acoustic elements of 270 kHz.



Manufacturer Wärtsila SAM Electronics
Model SAM4682
Serial No. n/a
Type acoustic doppler velocimeter
REGISTRY-Link ↪ REGISTRY (1620)


Transducer Frequency

Contacts
       
            

                    
                        

                            
                                Name
                            
                            
                                Institution
                            
                            
                                Role
                            
                        

                    
                    
            
                        

                            Reederei Briese
                            Briese Schiffahrts GmbH & Co. KG
                            Engineer In Charge
                        

                
                    
                

                
Components
The system consists of a transducer  with 3 hydro-acoustic elements installed in the ship's keel. It is operated from the bridge.

No subdevices available.
Position

                    
Infoxyz-position of transducer from Alignment Survey Report RV Heincke (January 2016). Electronics and operation on bridge deck.


X47.221 m
Positive X axis is forward and along the centerline of the vessel with X0 at the Stern point of the vessel.  


Y-0.017 m
 Positive Y axis is portside of centerline with Y0 at centerline at the Very stern point of the vessel.  


Z-0.074 m
Positive Z axis is upwards of basis. Z0 is set to the hydrophone on midship. 


                     
Data logging, storage and archiving
Logged parameters

                

                    
                        

                            
                                Parameter
                            
                            
                                O2ARegistry Output Type
                            
                            
                                Unit
                            
                        

                    
                    
            
                        

                            longitudinal ground speed
                            speed
                            knot
                        


                        

                            longitudinal water speed
                            speed
                            knot
                        


                        

                            transverse ground speed
                            speed
                            knot
                        


                        

                            transverse water speed
                            speed
                            knot
                        


                    

                
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 | Dolog |
|| Parameters | Longitudinal ground speed (kn)
Longitudinal water speed (kn) 
Sentence (text)
Transverse ground speed (kn) 
Transverse water speed (kn) |
Data archiving on land
After the cruise the DShip data set can be extracted from https://dship.awi.de/.
Documentation


        
 

    


	

		
		
	
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