Types of oceanographic observation methods

 As shown in the "Oshoro-Maru Ocean Observation Chart" below, there are a wide variety of oceanographic observation methods using ships, including towing (towing), placing on the seafloor (mooring), releasing from the ship into the ocean (drifting), and indirect measurement using sound waves, in addition to lowering instruments into the ocean with a wire rope extended from a stationary ship. In this section, we will explain the five main observation methods: (1) CTD observation, (2) biological sampling, (3) water sampling, (4) geological sample collection, and (5) acoustic measurement.

おしょろ丸　海洋観測図　Oshoro-Maru Ocean Observation Chart
北海道大学　Hokkaido University
海洋調査部　Oshoro-maru Marine Science Department
科学計量魚群探知機　Scientific Quantitative Fish Finder
極深海音響測深器　Extreme-Deep-Sea Acoustic Bathymetric Instrument
ソナードーム　Sonar Dome
ドップラー式多層流向流速計(ADCP)　Acoustic Doppler Current Profiler
マルチナロービーム音響測深機　Multi-narrow-beam echo sounder
CTD採水システム　CTD sampling systems
自己記録式CTD　Self-recording CTD
NORPACネット　NORPAC net
稚魚ネット　Fry nets
ピンガー　Pinger
マルチプルコアラ―　Multiple Coaler
ピストンコアラ―　Piston Coaler
海底地震計　Seafloor Seismograph
ORIネット　ORI Net
MTDネット　MTD Net
ソリネット　Solinet
漂流トラップ　Drift trap
係留系　Mooring system