The purpose of this publication is to provide the descriptions, procedures and detailed parameter explanations required to allow for safe and efficient use of the ST90 system. The publication also provides you with a thorough understanding of the parameters and adjustments provided by the ST90 system.
Even with the advanced noise filtering offered by the sonar system, we must address the noise challenge. This is important during the planning and preparations for the system installation. The echoes from any large and small target must be detected inside the noise.
Several factors are contributing to the performance of the hydroacoustic equipment used on board a vessel.
Any vessel equipped with a hydroacoustic system (for example echo sounder or sonar) will produce more or less self noise.
Ambient noise is usually not a limiting factor to the performance of sonars and echo sounders.
Electrical or electronic self noise is picked up or generated in any other part of the equipment than the transducer.
When you transmit an acoustic pulse into the water to search for a target, echoes will also be returned from any other objects in the beam. The energy reflected from these "unwanted" objects is referred to as reverberation.
Several factors are contributing to the performance of the hydroacoustic equipment used on board a vessel. Careful planning of the installation may reduce the acoustic noise.
The technical specifications summarize the main functional and operational characteristics of the ST90 system. They also provide information related to power requirements, physical properties and environmental conditions.
The ST90 system can send and receive information to and from several different peripherals. All transmissions take place as datagrams with data sentences. Each datagram has a defined format and length.
