Sonar comes from “sound navigation and ranging”. It is a system that uses sound transmission underwater and navigating or detecting objects on or under the surface of the water. There are two types of this technology: passive sonar and active sonar. Passive is essentially listening for the sound made by vessels. Active sonar is emitting pulses of sounds and listening for echoes.
A side scan sonar is one of the most sought and effective tools for underwater searches. This single-frequency side scan sonar can cover large areas quickly and “see” what’s on the bottom regardless of water visibility.
A side scan sonar is one of the most sought and effective tools for underwater searches. This dual frequency side scan can cover large areas quickly and “see” what’s on the bottom regardless of water visibility.
Sector Scanning is an ideal tool for the underwater search. It produces a “picture” of the underwater environment regardless of the water visibility. The reflected wave returns to the head and sent to the surface for display.
A Sub Bottom Profilers is used to identify the thickness of different strata layers below the ocean floor. Most importantly, it will also show any density disturbance within a strata layer. It’s the density disturbance that indicates something foreign within the strata layer.
JW Fisher Sonar
We offer three types of these devices. There are a direct scanner, several side scan tow-fish and a sub bottom profiler. For the side scan, we have the single-frequency SSS600kHz. Also, there is the dual-frequency SSS600kHz/1200kHz. The SSS450kHz/900kHz CHIRP side-scan sonar is also a dual-frequency device.
A sub bottom profiler is another device in this category. It identifies the thickness of different strata layers below the ocean floor. The sub bottom profiler called the SBP-1 shows any density disturbance within a strata layer. It’s the density disturbance that indicates that there is something foreign within the strata layer.