User Guide

688(I) ACTIVE INTERCEPT STATION

The 688(I)’s Active Intercept screen is seen below. Buttons and labels are described in Ship

Stations/Sonar/Active Intercept Sonar Station/All Subs: Buttons and Labels on p.92

AKULA ACTIVE INTERCEPT STATION

The Akula’ Active Intercept screen is seen below. Buttons and labels are described in Ship

Stations/Sonar/Active Intercept Sonar Station/All Subs: Buttons and Labels on p.92

SSP SONAR STATION (SOUND SPEED PROFILE)

The SSP Station displays the speed at which sound is transmitted at various water temperatures

and depths in the area around Ownship.Water typically forms distinct layers of density, which

profoundly affect sonar transmissions.Warmer, less dense water forms the upper surface duct—

below this, temperatures fall off sharply and density increases.The effect of this process is sound

generated in one layer doesn’t tend to transmit easily to the other layer, and vice versa.At the

beginning of any mission, always check the depth at which the surface duct separates from the

lower thermal.

Active Intercept contact

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