Impact Subsea ISA500 underwater Altimeter & Echo Sounder

The Impact Subsea ISA500 underwater Altimeter & Echo Sounder provides exceptionally long range measurement capability in excess of 120 meters. In addition to providing exceptionally long range capability, the unit has a 1mm accuracy allowing precision underwater distance measurements to be made. The ISA500 can also be provided with an integrated Attitude and Heading Reference System (AHRS). This provides highly stable Heading, Pitch and Roll readings. Operating by default at 500kHz, the unit utilizes a broadband composite transducer and electronics together with an advanced digital acoustic engine.

The combination of these enable the unit to achieve long range and high accuracy. Within the Impact Subsea there are three MEMS based Gyros, Accelerometers & Magnetometers. The outputs from each of these MEMS devices are fused together, providing highly stable Heading, Pitch & Roll. The Heading is highly resilient against temporary magnetic interferes.  This is aided by a soft and hard iron calibration feature once the unit has been installed on the ROV, AUV or other underwater application.