The Twin-line Engineering Development Model was installed on USNS Assertive, and the first production model was installed on USNS Bold.SURTASS began as development program in 1973 using the new research vessel Moana Wave. The new Stalwart-class ocean surveillance ships had the first contract awarded on 26 September 1980 and were similar to the prototype ship, the Moana Wave.
The active LFA system is an updated version of the fixed low frequency surveillance system known as Project Artemis.Lots of us are still using sonars with single-frequency, dual-frequency or even triple-frequency transducers, which have served anglers well for about 30 years.But you’ve probably also been hearing about new technologies such as CHIRP sonar.Modal Context$Modal Context Thread.run(Modal Context.java:122) Caused by: ssl. Input Record.handle Unknown Record(Unknown Source) at sun. SSLSocket Impl.start Handshake(Unknown Source) at sun. SSLSocket Impl.start Handshake(Unknown Source) at com.squareup.okhttp. Real Connection.connect Tls(Real Connection.java:192) at com.squareup.okhttp. Real Connection.connect Socket(Real Connection.java:149) at com.squareup.okhttp. Real Connection.connect(Real Connection.java:112) at com.squareup.okhttp. Stream Connection(Stream Allocation.java:184) at com.squareup.okhttp. Stream Healthy Connection(Stream Allocation.java:126) at com.squareup.okhttp. Stream Stream(Stream Allocation.java:95) at com.squareup.okhttp. Http Engine.connect(Http Engine.java:281) at com.squareup.okhttp. Http Request(Http Engine.java:224) at com.squareup.okhttp. SSLException: Unrecognized SSL message, plaintext connection? This article will help you to understand CHIRP, and what it can do to improve your fishing and boating.