Product Overview

The Surface Inductive Modem (SIM) is a vital link in Sea-Bird’s inductive modem (IM) telemetry systems, which provide data communications without the need for underwater electrical connections. The SIM provides the link between the underwater IM instruments and the computer / buoy controller. Communication with the computer / buoy controller is via RS-232. 

SIM-Direct is for typical cable-to-shore applications, where the inductive modem wire is insulated above the surface and connected to the SIM. A second wire from the SIM connects directly to seawater ground.

SIM-Coupled is useful for buoy applications, where the jacketed wire is grounded to seawater on each end and connected to the SIM via an Inductive Cable Coupler (ICC).

SIM (Surface Inductive Modem)