| Summary: | Progress Code: completed Statement: The quality of the scanned pages may vary. The dataset download contains scanned copies of the acoustics log and the voyage report from voyage 7 of the Nella Dan in the 1984-1985 season. The voyage departed Hobart on the 9th of February, 1985, and conducted marine science, as well as stopping at Davis, Mawson, Edgeworth David and the Shackleton Ice Shelf before returning to Hobart on the 17th of March, 1985. See the download file for full details, but some extracts from the voyage report are copied below. Report on Voyage 7 - Marine Science on Nella Dan, Malcolm Robb Due to the cancellation of the fishing and current meter components, the marine science program was redefined as a study of bird distribution and feeding habits as related to oceanographic phenomena. This program would utilise a towed body containing CTD instrumentation in conjunction with the hydroacoustic measurement of "food". In addition a second CTD could be used from the stern using one of the partly operating trawl winches. The study design A cruise plan was designed in which the collection of bird distribution data was given priority; hydroacoustic and oceanographic data were collected to complement the bird observations. Tide Gauges Two Annderra type tide gauges were to be deployed on behalf of the Victorian Institute of Marine Science (VIMS); one at Mawson and one at Davis. Observations of seabirds and marine mammals during voyage 7 - Jennifer A Bassett Seabird observations Systematic seabird observations were conducted from the MV Nella Dan during voyage 7. This was the third voyage during the 1984/85 austral summer when seabird observations were conducted by the same observer. To record distribution and abundance of seabirds during all voyages standard ten minute counts were used following the method outlined in the Revised Edition (February 1984) of BIOMASS handbook #18 (1982). On voyage 7, as in the previous voyages, observations were made where possible during all hours of daylight. A minimum of ...
|
|---|