Kaneohe Replacement Source

摘要

In 1978, an HX-137 acoustic source was installed off Kaneohe Bay, Hawaii. In 1980, the HX-137 was replaced by another HX-137. In 1986, the HX-137 failed after being inoperative for more than 2 1/2 years due to cable failure; the transducer failed about 30 days after the cable replacement. A brief engineering analysis was conducted to evaluate and select the preferred solution for replacing the failed transduce. This analysis recommended a moving coil projector, based on acoustic performance, timeliness and cost. The moving coil projector was designed, fabricated, calibrated and installed in 90 days. The ocean engineering design was developed to support an easy and quick replacement procedure so that an annual recovery and exchange of transducers, for purposes of refurbishment, could be readily and economically carried out; the design is based upon the premise that transducers will be refurbished on a 12-month schedule. The source is being operated on a continuous basis, and is meeting all performance objectives for the various users. This document describes and discusses the transducer and its parameters, the site characteristics, and the ocean engineering design effort. This document is written to provide a data base for users, and to aid in future improvements/changes.