NOAA RV McArthur II left Nimitz Marine Facility, Pt Loma at 0900 14 Jul 2009. After a short sea trial off San Diego and acoustic calibration in San Diego Bay, CalCOFI 0907 started its 101 station schedule - 75 standard plus 26 northern stations on line 67 (MBARI-SECRET) & 60.
This was our first cruise on the McArthur II and it proved to be an excellent platform for our project. We completed the first two lines quickly, aided by good weather and excellent ship handling and deck operations. On line 86.7 we were diverted north to line 83.3 (see cruise track figure below) after completing the CTD cast on sta 86.7 50.0 due to Naval operations in the area. Net tows on that station were missed. After two stations (83.3 51, 83.3 55), we returned to line 86.7, sta 86.7 55, and continued offshore without missing a station. We completed 66 standard stations and 8 SCCOOS stations before transiting north to Line 67 (66.7) off Monterey. Station spacing on line 67 was every 10nm out to 67.90 with CTD casts to 1025m. Twenty rosette water samples were collected on every 40nm standard CalCOFI station (50, 60, 70, 80, 90), and 12 rosette water samples were taken on 20nm stations (55, 65, 75, 85). Standard CalCOFI seawater analyses were performed on all depth sampled as well as additional incubations and analyses by MBARI tech Marguerite Blum (Lines 67 & 60 only). CTD and weather data were collected on 10nm stations: 52.5, 57.5, 62.5, 67.5, 72.5, 77.5, 82.5, 87.5. The McArthur II tied up in San Francisco at Pier 23 Aug 3rd and was offloaded onto trucks for equipment transport back to San Diego.