Planned maintenance — 19th January 2018 12:00 to 22nd January 2018 14:00 [more]

Cruise inventory

RV Prince Madog PD07/05

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Prince Madog (74P2)
Cruise identifierPD07/05
Cruise period2005-03-01 — 2005-03-04
Port of departureMenai Bridge, United Kingdom
Port of returnMenai Bridge, United Kingdom
ObjectivesThe objectives are to deploy the Coastal Observatory telemetry and ADCP moorings; to recover moored instrumentation, i.e. STABLE, PMP, Wave Buoy and ADCP frame at the mouth of the River Dee. Also to carry out CTD observations for at least a tidal cycle in the Welsh Channel and the Hilbre Swash, to study turbulence and SPM processes. To carry out a side scan sonar survey of the Hilbre Swash.
In the following narrative all times are UMT The Prince Madog was loaded on the 28/02/2005, mainly tool boxes and light personal things. We set sail at 0640 on the 1/03/2005 to the Hilbre Swash Channel. We arrived at 10:40 and proceeded to service the triaxis wave buoy, which was on board at 11:00. At 11:24 we started two lines of side scan sonar, finishing at 12 :37. We proceeded to anchor to carry out a 25 hour CTD station, but first we got a grab sample at 12:20. The CTD station was started at 13:30 and worked until 12:00 with several casts missed due to strong tidal currents. At 12:05 we lifted anchor and tried to recover PMP, through the Buff, but the PMP frame broke at 12:34. We abandoned efforts to carry out any recovery until tides slaked a bit and at 13:00 we redeployed the Wave buoy. STABLE was recovered at 13:47. We set sail to Vittoria Docks. Got to the lock gates at 17:20 and by the side at 18:00. We unloaded STABLE and loaded the telemetry mooring and ADCP. Set sail at 04:30 to the Hilbre Swash to recover the broken PMP. We got it on board at 08:30 and had to anchor to wait for the tide to be high enough to sail to the Welsh Channel. At 10:30 we set sail and anchored in the Welsh Channel at 13:05, when we started a CTD anchored station until 09:00 on 4/03/2005. We lifted anchor (09:30) and recovered PMP at 09:52. The weather was rough, so we aborted any attempt to retrieve the ADCP at station 12 and set sail to Menai Bridge, arriving at 14:00.
Chief scientistAlejandro J Souza (Proudman Oceanographic Laboratory)
ProjectDee experiment
Coordinating bodyProudman Oceanographic Laboratory
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificIrish Sea, Liverpool Bay, mouth of the Dee Estuary
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 3
Description: Underway Temp, sal, chlorophyll, transmittance.
CTD stationsQuantity: number of profiles = 73
Description: CTD profiles, supplementary Chlorophyll, Transmissometer and LISST data
Current profiler (eg ADCP)Quantity: activity duration in days = 3
Description: On board ADCP
Geology and geophysics 
GrabQuantity: number of samples = 1
Description: sediment grab
Long/short range side scan sonarQuantity: number of track lines = 2
Description: Side scan sonar in the Hilbre Swash
Moorings, landers, buoys 
Physical oceanography 
Transparency (eg transmissometer)53° 22' 11" N  3° 19' 30" W — LISST-100 C recording at 20 min burst every hour at 1.0 m from the bed
Current profiler (eg ADCP)53° 22' 11" N  3° 19' 30" W — Bottom mounted 1.2 MHz RDI ADCP, mode 12 every second; 50cm bin size 20 min burst recov.
Current profiler (eg ADCP)53° 22' 37" N  3° 14' 3" W — Bottom mounted 1.2 MHz RDI ADCP, mode 12 every second; 50cm bin size 20 min burst recov.
Instrumented wave measurements53° 23' 1" N  3° 14' 17" W — Triaxis wave ride, service
Other physical oceanographic measurements53° 22' 20" N  3° 14' 3" W — TABLE with 2 5 MHz ADV, 1 10 MHz ADV, LISST-ST, 3-D Ripple profiler, ABS, Fast CT Samp.
Data held at BODC 
Discrete samples 
73  CTD frame plus rosette samplerRaw suspended particulate material concentration sensor output
Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Raw fluorometer output
Salinity of the water column
Raw light meter output
Temperature of the water column
Dissolved oxygen parameters in the water column