Performance Specifications - Kongsberg EM 712 Maintenance Manual

Kongsberg EM 712 Maintenance Manual

Performance specifications

These performance specifications summarize the main functional and operational
characteristics of the EM 712 system.
• Maximum ping rate: More than 30 Hz
• Number of swaths per ping: 2
•
System version
Number of
soundings/ping
Number of
soundings/swath
• Beamwidths: 0.25 x 0.5, 0.5 x 0.5, 0.5 x 1, 1 x 1, 1 x 2 or 2 x 2 degrees
• Beam spacing: Equidistant, Equiangle, High Density
• Coverage sector: Up to 140°
• Transmit beam steering: Stabilized for roll, pitch and yaw
• Receive beam steering: Stabilized for roll
• Depth range from transducers: 3 to approximately 3600 metres
• Pulse lengths: 0.2, 0.5 and 2 ms CW and FM (chirp) up to 120 ms
• Range sampling rate: 15 kHz (5 cm) at data output
• Source level:
– 1° TX: Up to 225 dB re 1 µPa ref 1 m
– 0.5° TX: Up to 231 dB re 1 µPa ref 1 m
– 0.25° TX: Up to 237 dB re 1 μPa ref 1 m
Available beamwidths at the given frequencies
40 kHz
0.25° TX 0.6
0.5° TX/RX 1.2
1.0° TX/RX 2.4
2.0° TX/RX 4.8
132
Number of beams and soundings
0.25 x 0.5 0.5 x 0.5
1600 1600
800 800
50 kHz
0.5
1.0
2.0
4.0
0.5 x 1 and 1 x 1 1 x 2 and 2 x 2
800 400
400 200
70 kHz 100 kHz
0.35 0.24
0.7 0.5
1.4 1.0
2.8 2.0
451106/B