?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Seabed+discrimination+data+from+SeaScan%E2%84%A2&rft.creator=Brown%2C+Ian+Walkden.&rft.subject=Science+(General)&rft.description=Raw+data+from+SeaScan%E2%84%A2+transects+off+Wide+Bay+(south+Queensland)+taken+in+August+2007+as+part+of+a+study+of+ecological+factors+influencing+the+distribution+of+spanner+crabs+(Ranina+ranina).+The+dataset+(comma-delimited+ascii+file)+comprises+the+following+fields%3A+%0D%0A%0D%0A1.%09record+number%0D%0A2.%09date-time+(GMT)%0D%0A3.%09date-time+(AEST)%0D%0A4.%09latitude+(signed+decimal+degrees)%0D%0A5.%09longitude+(decimal+degrees)%0D%0A6.%09speed+over+ground+(knots)%0D%0A7.%09depth+(m)%0D%0A8.%09seabed+roughness+(v)+%0D%0A9.%09hardness+(v)+%0D%0A%0D%0AIndices+of+roughness+and+hardness+(from+the+first+and+second+echoes+respectively)+were+obtained+using+a+SeaScan%E2%84%A2+100+system+(un-referenced)+on+board+the+Research+Vessel+Tom+Marshall%2C+with+the+ship%E2%80%99s+Furuno+FCV+1100+echo+sounder+and+1+kW%2C+50+kHz+transducer.+Generally+vessel+speed+was+kept+below+about+14+kt+(typically+~12+kt)%2C+and+the+echo-sounder+range+set+to+80+m.+The+data+were+filtered+to+remove+errors+due+to+data+drop-out%2C+straying+beyond+system+depth+limits+(min.+10+m)%2C+or+transducer+interference.&rft.type=Dataset&rft.type=PeerReviewed&rft.format=text%2Fplain&rft.relation=http%3A%2F%2Fera.daf.qld.gov.au%2Fid%2Feprint%2F6184%2F1%2FSeaScan_31Aug2007_dataset.asc&rft.identifier=+++Brown%2C+I.+W.+++Seabed+discrimination+data+from+SeaScan%E2%84%A2.++Department+of+Agriculture%2C+Fisheries+and+Forestry%2C+Qld.+%5BDataset%5D++++&rft.identifier=http%3A%2F%2Fera.daf.qld.gov.au%2Fid%2Feprint%2F6184%2F&rft.relation=http%3A%2F%2Fera.daf.qld.gov.au%2Fid%2Feprint%2F6184%2F