RV Cefas Endeavour 02A/11
Cruise summary report
|Ship name (ship code)||RV Cefas Endeavour (74E9)|
|Cruise period||2011-01-06 — 2011-01-13|
|Port of departure||Lowestoft, United Kingdom|
|Port of return||Lowestoft, United Kingdom|
To conduct a multibeam survey of an area of seabed between Start Point to West Rutts in the Prawle Point to Plymouth Sound and Eddystone Reefs cSACand Start Point to Prawle Point dSAC off South Devon.
Cefas Endeavour sailed from Lowestoft at 11:45 on 06/01/11 and transited south into the channel and then west to a multibeam calibration site south of Lyme Bay (HMS Formidable).
On completion of the calibration exercise Cefas Endeavour continued west to begin the multibeam survey between Start Point and Plymouth. On arrival, a SVP cast was carried out (14:00, 07/01/11). Cefas Endeavour then proceeded to survey the priority area.
Several survey lines were run before a second SVP cast was carried out at (16:29. 08/01/11). On completion of the SVP cast Cefas Endeavour continued to acquire multibeam data along planed survey lines. During the acquisition of new acoustic data the previously collected data were post processed using CARIS HIPS to enable the true quality of the data to be assessed.
At 13:49, 09/01/11 banging under the hull was noted and checks for fouling of the rudder and propeller were made. No gear was observed so it was decided to return to the survey and reassess the problem when the next SVP cast was carried out (18:00, 09/01/11). While the vessel was stationary, the drop camera was deployed over the stern in an attempt to see if any fouling could be observed. With no conclusive evidence that the rudder or propeller were fouled, Cefas Endeavour returned to the survey grid. At 19:33, the survey was aborted due to a propeller shaft seal alarm. In consultation with the captain and chief engineer it was deemed necessary to transit and dock in Falmouth to allow divers to inspect and assess any damage.
At 09:00, Cefas Endeavour docked in Falmouth after completing 577KM of multibeam survey. The planned diver survey was undertaken at 10:00, 10/01/11 and identified rope around the propeller shaft. After removal of this rope damage to the outer shaft seal and rudder was also identified the latter resulting in Cefas Endeavour needing to dry dock.
|Chief scientist||Paul Whormersley (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)|
|Cruise report||(3.18 MB)|
|Specific||English Channel (Prawle Point to Plymouth Sound SAC)|
|Track charts||(00 MB)|