44

Cruise Report, RV ATAIR, Cruise 0671021-1, Bremerhaven - Thyboron —- Aberdeen, 18 Jul - 10 Aug 2023

x °N 1

49%

Sf

57°

Kb

=

2)

a2

a

3.5
3.25
3
2.75
2.5
2.25
?
1.75
1.5
1.25
1
0.75
0.5
0.25
0

?V Atair
759 0671021-1
‚o Juf- 10 Aug 2023
Bremerhaven-Thyboran-Aberdeen

51° = — ;
8W 6° 4°

7°

9°

„0

A°

6°

8° 10° 12°E

Figure 7.7. Spatial distribution of the near-suface turbidity [NTUJ] during cruise 0671021-1 obtained from
the flow-through ECO sensor and displayed as 30 min averages. Colours denote turbidity in the range
0- 3.5 NTU, individual values are highlighted every 12 hours.

7.3

Perfomance of the Vessel-Mounted Acoustic Doppler Current
Profiler

A vessel-mounted Acoustic Doppler Current Profiler (VMADCP) was used for continuous recording
 of single ping velocity data in the water column. The instrument is of type Teledyne
RD Instruments (TRDI) Ocean Surveyor (OS), operating at 150 kHz, with a flat phased-array
transducer mounted in the hull of the ship. Since the VMADCP does not have any further builtin
 sensors, additional data on heading and tilt were obtained from the ship's Hydrins system
Data recording was carried out with the TRDI VmDas software, version 1.50.19. Characteristic
parameters of the device installed on RV ATAIR are listed in Table 7.2.