[ChefKeith]

Sounds like SINS(Ships Inertial Navigation System) was in error......Bottom sounding sonar should have been manned or at least put on auto and set to alarm....some splainin' to do by the navigator and chief quartermaster.

SINS is no longer in use. It was last used on the 637 Class and was replaced in 92-93 with ESGN (electrically suspended gyro navigation)

[WildTurkey]

SINS is no longer in use. It was last used on the 637 Class and was replaced in 92-93 with ESGN (electrically suspended gyro navigation)

I was brand new on a 637 class and we were about to get underway. A veteran 2nd class asked me to go with him to finish the PM's. We got to the SINS cabinet and he started to open it. I questioned him since there was a warning label on the door. He said no problem, he had done this all the time (in port). As soon as he opened the door, we heard a %$#)*()*{. Censored for family audience.

[DBeers]

SINS is no longer in use. It was last used on the 637 Class and was replaced in 92-93 with ESGN (electrically suspended gyro navigation)

I resemble that remark... Actually, there was a transition... I was on a 640 Class (656 boat) we had dual SINS and a single ESGM (monitor)

get qualified! ;)

[SlowBoat407]

Actually, the latest version is the RLGN (Ring Laser Gyro Navigator), which I believe is on all the latest boats.