Impact Subsea’s long-range ISA500 altimeter was selected by Explosive to deliver consistent underwater distance measurements during magnetometer survey operations.
Explosive carried out magnetometer surveys of the seabed in areas designated for dredging as part of the Liquid Fuels Transfer Station expansion at the Port of Gdynia.
The company needed a way to monitor the underwater altitude of magnetometers. They required accurate control of the magnetometer’s height above the seabed along with reliable bathymetric measurements.
By using the Impact Subsea ISA500 altimeter, Explosive gained real-time underwater distance readings and precise altitude control. This allowed operators to conduct magnetometer and bathymetric surveys accurately and efficiently, with dependable data and uninterrupted operations. The altimeter was selected due to its rugged construction, precise measurement capability, and real-time performance.
The ISA500 altimeter features a 120+ meter range with proven long-range capability and 1 mm accuracy, delivering millimeter-level precision. An integrated AHRS provides magnetic heading accuracy to ±1°, with pitch and roll accuracy down to 0.2°.
An optional echogram allows visualization of sonar backscatter data, with up to 2,000 samples per ping. The system can emulate any device, enabling direct replacement of existing equipment. It is available in a range of depth ratings, including 1000 m, 6000 m, and 11,000 m versions.
Stanislaw Kuzmanow of Explosive commented, “We use the Impact Subsea altimeter for every mag survey job we do. It allows us to monitor the depth of the basin in real time and also to control the height of the magnetometers above the bottom. It also allows us to take a simple bathymetric survey before starting a mag survey. We are very satisfied with the quality of the Impact Subsea Altimeter, it has never let us down.”
ISA500 Applications Include:
- Scour Monitoring
- Touchdown Monitoring
- Hydro-graphic Survey
- Motion Reference
- Wave Height Measurement
- Equipment Deployment
- Under Ice Measurement
- Underwater Positioning
- ROV & AUV Altitude & Heading
