Sonardyne ORT Release 7409

Available as:
  • Rental
  • Sale (ex rental)

Sonardyne ORT Release 7409 – Available for rental, hire and ex-rental purchase from Ashtead Technology.

The Sonardyne Oceanographic Release Transponder (ORT), Type 7409, is an acoustic release which will operate following a sequence of commands provided by the Sonardyne Lightweight Command Unit (LCU) type 7663.

Battery Life: Operational life consists of quiescent life plus at least 25 releases under full load (Alkaline) and at least 75 releases (Lithium). Deck testing of the release without load causes negligible battery drain.

Technical specifications

Frequency/BandMedium Frequency
Tx Frequencies16.5 - 17.5 kHz
Tx Pulse Length10 ms
Tx Source level186 dB re 1m Pa at 1m
Tx Beam PatternHemispherical
Rx Frequencies17.5 - 19.5 kHz
Rx Sensitivity<90 dB re 1m Pa
Safe Working Load850 kg
In Line Breaking Load5,100 kg
Maximum Buoyancy Load for Release1,700 kg
Battery Operational LifeAlkaline - 9 months Lithium - 2 years
Shelf Life of disconnected battery(stored at < 25° C) Alkaline - 2 years Lithium - 7 years
MaterialAluminium Bronze
Maximum Operating Depth2,000m


Command Unit - Weight in air8 kg17.6 lbs
Weight in water3 kg6.6 lbs
Shipping Weight40 kg88.2 lbs
Transducer473mm x 102mm18.6 x 4""
Release - Weight in air22 kg48.5 lbs
Weight in water17 kg37.5 lbs
Shipping Weight30 kg66.1 lbs