HYDROACOUSTICS
ANNUAL JOURNAL |
START | NEW VOL 20 | SEARCH | STATISTICS | PAS - GDANSK DIVISION |
pp. 381-388, vol. 11, 2008 Grażyna Grelowska Polish Naval Academy in Gdynia, Gdynia, Poland Wojciech Szymczak Polish Naval Academy in Gdynia, Gdynia, Poland Krystian Buszman Polish Naval Academy in Gdynia, Gdynia, Poland Key words: Abstract: The paper presents the laboratory station to measure directivity characteristics of narrow beam sonar’s and echo sounder’s antennas. It will be describe method of collecting samples from surface, unit used to precise positioning receiving hydrophone, construction and use of rack to direct main beam in exact direction. Additionally we show station to measure drift of the sea bottom impedance.
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