2. Participating vessel
|R/V Nereis (Pelagos Cetacean Research Institute)
3. Means to be employed a board
3. Test area:
4. Operations day by day (all times are in local Greek time = GMT + 3)
SUNDAY August 3 - arrival in Zakynthos port of CINTAL team and meet PCRI team on board R/V Nereis.
MONDAY August 4 - equipment installation in Zakynthos port and trip to Keri.
|10:00 arrival of equipment on Zakynthos port. Equipment loading and
installation; 14:00 - arrival of FORTH team and winch loading and installation. 19:00 - leaving
Zakynthos port towards Keri, arrival at 21:00. Mooring in Keri.
|Keri port as seen from R/V Nereis||Turtle shaped island in Keri.|
TUESDAY August 5 - forecast for area west of Zakynthos: Beaufort 4 in the morning increasing to 5
and 6 in the afternoon. Decision was made to perform an equipment test in the protected area south of
|08:00 technician on board for engine repair; 11:15 left Keri direction
to the southeast sheltered area; 12:30 arrival on area; 13:15 made CTD using FORTH winch (see left);
13:40 deploy AOB21 and then AOB22 at about 200m distance; deployed pinger at 100 m depth and transmitted
signals to AOBs while on station and while running south, to the deepest area. AOBs were successfully
recovered at the end of the day in low wind and waves conditions.
|FORTH winch and AOB21 ready for deployment||Sound velocity profile obtained with RBR Concerto CTD.|
WEDNESDAY August 6 - same forecast for area west of Zakynthos: Beaufort 4 in the morning increasing to
5 and 6 in the afternoon. It appears that weather in the protected area is stable, so decision was made to
perform the pinger run in the deepest area in between Zakynthos and the main land.
|09:45 left Keri to the southeast; 10:15 deploy towed whale array;
11:30 arrival on site for 900m water depth; 11:40 make CTD with winch; 12:00 deploy AOB22 with SR1 on
hyd #1; 12:20 deploy AOB21 with SR1 on hyd#3; 12:20 deploy pinger with 500 m cable scope. Pinger remains
almost horizontal as R/V Nereis drifts towards south. 13:15 weather worsening, 1 m height waves; 14:00
recover AOB21 and 14:30 recover AOB22.
|deploying AOB22||5s 11kHz pings as received on AOB hydrophone 5@54m depth|
THURSDAY August 7 - bad weather forecast for all Ionian area. Stay in port of Keri. Repaired Nereis
to port electrical connection. Sylvia Frey left.
FRIDAY August 8 - the forecast is good for the west Zakynthos area. Decided to chase for whale
|07:20 leave Keri to west Zakynthos (Hellenic Trench); 07:45 deployed
towed whale array; going first towards south and out and then north along the Trench, up to the northern
border of Zakynthos I. Several hearings of dolphins but no whale detection; back in port at 15:00.
|PCRI 2-hydrophone whale array||GPS track made by R/V Nereis on August 8|
SATURDAY August 9 - better forecast, decided for short whale track and then pinger experiment on
deep area southeast of Zakynthos I.
|07:20 left Keri to west whale track; 07:45 deploy towed whale array;
going west, then south and then east towards the deeper area southeast of Zakynthos I, without any
whale detection. 11:30 arrival on site for 700m water depth; 12h make CTD with strong drift, so pay
out 200m of cable; 12:20 deployed AOB21 without wifi and then AOB22, approximately 300 m to the east;
13:00 deployed pinger with 600m of cable while drifting south; 13:40 payed out another 400m of pinger
cable; starting half circle pattern as foreseen in the test plan.14:30 reached approximately 4 km from
AOB22 and still receiving wifi loud and clear. 15:30 shortened pattern due to AOB's drift and sea state
deteriorating, recovering pinger. 16:00 recovering AOB21 and AOB22 by beaufort 4 (1-1.5m waves).
Heading to swim area.
|recovering AOB22||temperature - depth track of pinger|
SUNDAY August 10 - very good weather forecast, heading south for whale detection area.
|09:30 left Keri heading south; 10:30 deploy towed whale array;
stop every 15 min for listening; 11:00 spotted dolphins; 11:30 turned north; close visual contact with
large cargos; 12:15 spotting dolphins; 13:30 heading southeast again; 14:30 reaching turn to Zakynthos
and heading to swim area at 15:00; heading to Keri at 18:00.
|Nereis track||spotted dolphins|
MONDAY August 11 - the best day we had in a week ! Last chance for whale chasing. 09:30 left Keri
heading west and then south and then east with whale array out and stopping engines every 15 min; no signs
of whales. 16:00 heading to Zakynthos town. 18:00 arrival in Zakynthos and end of the cruise.
Who said sea trials were not funny ?
|having a swim in the caves||ship wreck (NW Zakynthos I.)|
Test plan: version 7 (9 June 2014)here