Mariner

Slim Profile Shallow Water Data Recorder

PRODUCT DETAILS

The Mariner is designed for extended-duration seabed ocean bottom seismic data acquisition. Nodes are ideally deployed at shallow depths down to 750 meters with continuous recording for up to 70 days.

Features

  • Wireless charge and data download
  • Continuous cable-free 4C autonomous recording
  • Maximum operating depth of 750 meters
  • Battery life: 70 days operation
  • Built-in full resolution test generator
  • Solid-state flash memory: Up to 32 GB per channel
  • Internal heading sensor

GS-ONE Omni Geophone

Physical Specifications

Moving Mass
13.2 g
0.466 oz
Maximum coil excursion p-p
4.06 mm
0.16 in.
Minimum coil excursion p-p
1.02 mm
0.04 in.
Diameter
30.5 mm
1.2 in.
Height
40.7 mm
1.6 in.
Weight
130 g
4.60 oz
Operating and Storage Temperature Range
–40°C to +100°C
–40°F to +212°F

Electrical Specifications

All parameters are specified with 7.5 kΩ load at 25°C in all tilt positions unless otherwise stated.
Frequency
15 Hz
Spurious Frequency
>160 Hz
Distortion at Horizontal
0.05% typical
Coil Resistance
1450 Ω
Sensitivity at 70% Damping
69.2 V/m/s (1.75 V/i/s)
Open-Circuit Damping
70%
Distortion at all tilt angles
<0.2% measured at 15 Hz with 0.2 in/s p-p

MP 18 BH Hydrophone

Electrical Specifications

Nominal Capacitance (at 25°C 1atm)
16.0 nanofarads
Voltage Sensitivity
4 V/Bar
Sensitivity (dBv ref 1μPa @ 25°C)
208 dB
Frequency Response (into 2 MΩload)
5 –1,000 Hz (typical)

1. Safe to be used slightly below 0°C as long as water is not frozen. Do not let hydrophone be frozen in ice, as this will cause irreversible damage to the crystals.

2. Voltage Sensitivity is specified when connected to OBX.

Mariner

Mechanical Specifications

METRIC
US
Length
578 mm
22.75 in.
Width
178 mm
7.0 in.
Height
102 mm
4.0 in.
Weight in Air
7.85 kg
17.3 lbs.
Weight in Seawater
2.39 kg
5.26 lbs.
Maximum Operating Pressure
7.5 MPa/75 Bar
1,095 psi
Maximum Operating Depth
750 M
2,460 ft.
Operating Temperature Range
–5°C to +50°C
+23°F to +122°F

Electrical Specifications

Digitized 4C Recording Station: 4 Channel, 24 Bit A/D Digitizer3C Orthogonal oriented GS-One OMNI Geophones1 MP-18BH-2500 Hydrophone
Digitization
24-bit Delta-Sigma
Sample Interval
0.25, 0.5, 1, 2, 4 ms
Pre-amplifier Gains
0, 6, 12, 18, 24, 30, 36 dB
Maximum Input Signal
1.8Vrms
Equivalent Input noise (@2ms sample interval)
0.17μVrms
Gain Accuracy
Better than 1%
Anti-alias Filter
83% Nyquist
Instantaneous Dynamic Range
124dB @ 2 ms sample interval
THD
<0.2%
Distance Between Digitizer & Farthest Sensor
<36 cm
Distance Between All Sensors
<4 cm
Flash Memory
16 GB or 32 GB per channel
Frequency Response
1 Hz – 825 Hz @ 1/2 ms sample interval
Battery Life
70 days operation
Internal Heading Sensor
+/-5º