To provide a marine information collection system that can make a buoy rise and sink easily and also remain in standby in the water.
A marine information collection system includes: an anchor 1 which is positioned on the ocean floor; an intermediate buoy 2 which is connected to the anchor 1 and suspended in the water; a mooring cable 3 which is connected at its one end to the intermediate buoy 2; and an observation buoy 4 which is connected to the other end of the mooring cable 3. The observation buoy 4 includes: a body part 41, the longitudinal direction thereof being positioned in the direction of the progression of the ocean current; a specific gravity adjustment part 42 which is positioned in the body part 41 and is provided with an inflatable float bladder; an antenna 43 which is positioned in the body part 41 and carries out data transfer; and an observation part 44 which is positioned in the body part 41 and acquires prescribed marine information. The observation buoy 4 is made to rise by inflating the float bladder of the specific gravity adjustment part 42, and made to descend by deflating the float bladder of the specific gravity adjustment part 42, thus being made to remain in standby in the water. It is possible to easily make the observation buoy 4 rise and sink, as well as to remain in standby in the water.
OMORI TAKUYA
ICHIKAWA MASAAKI
WADA YOSHIYUKI
NAKAGAWA TOSHIHIKO
Echizen Masahiro