Profile: FarSounder, Inc. manufactures advanced 3d sonar systems for marine navigation, obstacle avoidance and security applications. We provide navigation sonar, screen shots and custom solutions. Our navigation sonar includes FS-3DT, FS-3DT bistatic, FS-3ER and FS3-special application. Our FS-3DT uses dual transmission technology. It provides a 90° field-of-view depth map with a single ping. It also includes a narrow beam ¼ mile range mode. This dual transmission design can be configured to automatically switch between the standard 90° ping, and the long range narrow beam ping.