RDANH Shallow Water Multibeam Sonar Training and Operations: The past decade, and future prospects 3 rd April 2005 The Royal Danish Administration of Navigation and Hydrography

RDANH Data capture fundamentals. What is needed? Position Depth Time

RDANH RDANH’s first shallow water multibeam system

RDANH The hydrographic survey launch Survey launch (O-Boat): Length 7.75 meters Width 2.5 meters Tonnage3.5 t Equipment: GPSAshtech Z-12 Motion sensorPOS/MV MultibeamSeaBat 8101 SinglebeamNone Sidescan imagerySeaBat 8101 Heading sensor POS/MV Sound velocityASV5002 On-line SVLSVP-C

RDANH Survey launch concept. CTD Surveyor Motion-sensor Multibeam Helmsman GPS-receiver On-line SVL Multibeam mounting

RDANH The hydrographic survey boat Survey Boat (SKA-79 class): Length 20 meters Width 5.2 meters Tonnage50 t Equipment: GPSAshtech Z-12 Motion sensorPOS/MV MultibeamBCC MK II – Denmark SeaBat8111ER – Greenland SinglebeamNavisound 420 Sidescan sonarEG&G DF-1000 Heading sensor POS/MV and Anshütz Standard-20 Sound velocityASV5002 On-line SVLSVP-C

RDANH The hydrographic survey ship SF-300 class Gribben (GRIB) Length 52 meters Width 9 meters Tonnage300 t Equipment: GPSAshtech Z-12 Motion sensorDMS2-05 MultibeamSeaBat8101-ER SinglebeamNavisound 420 Sidescan sonarEG&G DF-1000 SideScan imagery SeaBat8101-ER Heading sensor LSN INS system Sound velocityASV5002 Sound velocityScanFish MKII On-line SVLSVP-C

RDANH The new hydrographic survey boat MSF class “NoName” Length Width Tonnage Equipment: GPS Motion sensor Multibeam Singlebeam Sidescan sonar Heading sensor Sound velocity On-line SVL 29 meters 6.4 meters ~ 100 t Javad - Maxor POS/MV SeaBat7100 Dual 100/200 KHz SeaBat7125 Navisound 420 EG&G DF-1000 LSN INS system ASV5002 MVP SVP-C Moon pool for SeaBat7100 mounting Hull mounted SeaBat7125

RDANH Mounting of Seabat7100/7125 SeaBat7100 mounting SeaBat7125 mounting

RDANH The harmonized resurvey plan for routes in the Baltic area. As required by the HELCOM Copenhagen declaration

RDANH Background Baltic Sea countries have agreed on a joint hydrographic re-survey plan. The plan is implemented from The resurvey of the Danish routes and ports is expected finished in 2007.

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Vertical test !

RDANH Target in the Sound Tower GPS antenna

RDANH RTK test in the Sound 197 observations on target N E Correct XYZ (DNN)

RDANH RTK test in the Sound

RDANH RTK problems!

RDANH In-house software Vise – Line editor Semi – building up DTM’s SemAntics – analytic tool Forward and backward method Svelte – Analytic tool for sound speed validation Test of automated line editing.

RDANH Sound Speed - problem!

RDANH Details from the Sound Mooring from bouy Larger stones Barrier Tunnel Dredging

RDANH What do we do when echo sounding fails?

RDANH Another multibeam survey in shallow water

RDANH Multibeam limitations – and one solution Eel grass Sidescan imagery from SeaBat 8101 Bathymetry from SeaBat 8101

RDANH RTK - Bar sweep

RDANH RTK - Bar sweep

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Questions ? Royal Danish Administration of Navigation and Hydrography Overgaden O. Vandet 62B P.O. Box 1919 DK-1023 Copenhagen K