Upload
others
View
9
Download
0
Embed Size (px)
Citation preview
Report of Survey- SK356 2019
Page | 1
SK-356 Cruise Report (22nd February - 14th March 2019)
Geoscientific Studies of the Exclusive Economic Zone
NATIONAL CENTRE FOR POLAR AND OCEAN RESEARCH HEADLAND SADA, VASCO-DA-GAMA (GOA)-403804
Report of Survey- SK356 2019
Page | 2
1. INTRODUCTION
Geoscientific studies of the Exclusive Economic Zone (EEZ) programme is
implemented mainly to prepare a comprehensive seabed topographic map for the entire
Exclusive Economic Zone of India using the state of the art technologies of
multibeam swath bathymetry. Being the nodal agency of EEZ programme, National Centre
for Polar and Ocean Research (NCPOR), Goa is carrying out the multibeam survey in
the deep waters (>500m depth contours) within the EEZ of India. The survey was carried out
to cover the proposed area of EEZ zone of Bay of Bengal with 13 survey lines and 2 CTD
stations.
2. CRUISE ITINERARY
Embarkation : Vishakhapatnam, 22 Feb, 2019
Disembarkation : Chennai, 14 March, 2019
Total No. of Days : 21 days
3. LIST OF PARTICIPANTS
1 Mr. Bijesh C M Chief Scientist NCPOR
2 Dr. Prajith A Dy. Ch. Scientist -do-
3 Mr. Akhil Augustine Student CUSAT
4 Ms. Amrutha U R -do- -do-
5 Ms. Anjana Gireesh S -do- -do-
6 Mr. Athish K P -do- -do-
7 Mr. Basid K W -do- -do-
8 Ms. Jumana Habeeb -do- -do-
9 Ms. Layapriya Suresh -do- -do-
10 Ms. Mariya T D -do- -do-
11 Ms. Sharuja M S -do- -do-
12 Mr. A Arshan -do- -do-
13 Mr. Abhimanyu Rajan -do- -do-
Report of Survey- SK356 2019
Page | 3
14 Ms. Ahanamol K P -do- -do-
15 Ms. Ambili P V -do- -do-
16 Ms. Anju K S -do- -do-
17 Ms. Anu Thomas -do- -do-
18 Ms. Aparna C V -do- -do-
19 Ms. Bindhu S -do- -do-
20 Ms. Raihanh K R -do- -do-
21 Mr. Sebin John -do- -do-
22 Mr. Subin Raj V B -do- -do-
23 Ms. Dhanya Krishnan -do- -do-
24 Mr. P Boopathy AMC Engineer NORINCO
25 Mr. V C Sarathchandran -do- -do-
26 Mr. Rajendran Prakash -do- -do-
27 Mr. G Mahadevan -do- -do-
4. EQUIPMENTS
Item Manufacturer Serial Number /
Version/Model
Multibeam Echosounder L-3 Communications SeaBeam 3012
Singlebeam Echosounder SyQwest Bathy2010
Motion Reference Unit IXSEA OCEANO Octans/3453-399
Differential GPS C-Nav 268599
Surface Sound Velocity Profiler Valeport 22266
Conductivity Temperature Depth
Profiler SEA BIRD Electronics 11plus
Sound Velocity Profiler Valeport 21652
MBES Acquisition Software EIVA NaviPack 3.5.8
MBES Processing Software CARIS HIPS & SIPS 7.1
Table 1 : List of onboard equipment models
Report of Survey- SK356 2019
Page | 4
5. GEODETIC PARAMETERS
Geodetic Parameters
Horizontal Datum and Ellipsoid WGS 84
Spheroid WGS 84
Semi major axis a = 6 378 137.0 m
b = 6 356 752.314245 m
Relative Flattening 1/f = 298.257223563
Projection Parameters
Map Projection Universal Transverse Mercator
Central Meridian 93°E, UTM Zone 46N
Latitude of Origin 00° 00′ 00″ North
False Easting 500000
False Northing 0 m
Scale factor on Central Meridian 0.99960
Units metre
Table 2 : Geodetic parameters
6. OPERATIONS
6.1 MULTIBEAM ECHOSOUNDER
SeaBeam 3012 Multibeam Echosounder system that measures bottom depth across up to
120° swath perpendicular to vessel’s track was used in this survey. This model generates
up to 165 beams equal angled bathymetry soundings per ping and broadcasts from the
sonar processor to the data acquisition software, where they are corrected for mechanical
offsets, motion, heading, refraction, tide or depth and position.
All the run lines were planned and executed in an efficient manner as possible i.e.
straight; however in certain area this could not be achieved and curved lines were run.
These maneuvers do not impact on the data quality as the systems chosen are capable of
recording data to their designed specifications. Also the line spacing was carefully
planned to obtain sufficient overlap and therefore 100 % coverage was achieved.
6.1.1 TECHNICAL SPECIFICATION
Manufacturer L3-Communications Elac-Nautik
Number of active Beams 161
Swath Angle 115°
Spacing Method Equi-angle
Operating Frequency 12 kHz
Power -3.00 dB
Acquisition Software Hydrostar 3.5.8
VESSEL OFFSETS
Navigation Sensor
X -1.6m
Report of Survey- SK356 2019
Page | 5
Y -35.00m
Z -14.6m
Motion Sensor
X -1.27m
Y -5.5m
Z 3.11m
MBES (Hydrophone)
X 0m
Y 0m
Z 5.3m
Roll 0.12°
Pitch 0°
Yaw 0°
MBES (Projector)
X 0m
Y 5.25m
Z 5.3m
Roll 0°
Pitch 0.52°
Yaw -0.25°
6.1.2 DATA ACQUISITION
SeaBeam-3012 Multibeam Echosounder on-board ORV-Sagar Kanya was utilised to
carry out the surveys in Andaman region AN-1 block. The SB-3012 is a 12 kHz; 209
beam sonar system; has a beam width of 2° at nadir and is capable of measuring depths
ranging from 200 m to 11000 m. The complete Multibeam system complex comprises of
many sub systems:
a) Surface Sound velocity (SSV): The surface sound velocity profiler is an underway
ocean surface profiling system that collects the water sound speed continuously.
b) Gyro & Motion Sensor: Multibeam system uses IXSEA-Octans sensor for Gyro
and motion input. Octans is an IMO compliant survey grade gyrocompass with an
integral motion sensor.
c) Positioning System: The C-NAV DGPS subsystem is used for positioning
accuracy. The C-Nav GPS receiver can accept two (2) different GcGPS correction
service message formats. The C-Nav; dual frequency; GPS equipment receives
either of these corrections broadcast from the communications satellite; applies them
its own observed refraction corrected C/A code; dual frequency observations; and
performs a navigation solution. The resulting corrected GPS position; velocity and
time (PVT) are output from the C-Nav equipment to other subsystems on the
platform/vehicle/vessel to support the navigation positioning control requirements.
d) Network Time Server with GPS Synchronized Time Base: LANTIME (local area
network timeserver) provides a high precision time base to a TCP/IP network
Note: Sign conventions
X +ve Starboard
Y +ve Forward
Z +ve Down
Report of Survey- SK356 2019
Page | 6
(stratum-1-server). LANTIME/GPS is a set of equipment composed of a satellite
controlled clock GPS167; a single board computer with integrated network board
and a power supply;
Figure 1 : MBES Acquisition module
6.1.3 DATA PROCESSING
All the collected multibeam data was processed on-board using CARIS HIPS and SIPS
7.1 software. Sound Velocity profiler data applied during data acquisition was re-
checked during post processing. Zero Tide correction was made for all lines. All the
processed soundings are with respect to Reference Point (MRU) in the vessel.
Figure 2 : Data Processing overview
Import Raw Data
Check Vessel offset
details
Navigation editing Attitude
editing
Apply Tide
Apply Sound
Velocity Correction
Merge
Filedsheet Creation
Surface generatio
n
Apply Noise Filters
Manual Noise
Cleaning
Data QC
Finalise Surface
Export Data
Report of Survey- SK356 2019
Page | 7
Processing log sheets were maintained for all survey lines; processing log sheets are
included with the data delivery.
6.1.4 RESULTS
In order to consider for the multibeam swath coverage, survey tracks were pre-planned
from GEBCO bathymetry details. A total of 13 survey tracks (~2250 km length) with 02
CTD/SVP station covering an area of about ~8250 km2
was achieved during this cruise.
The details of survey carried out are given below,
6.2 SINGLEBEAM ECHOSOUNDER
Singlebeam Echosounder is high power deep water system capable of measuring depths
up to 10,000 m. Onboard ORV Sagar Kanya having SyQwest Bathy2010, It is rated at a
maximum power level of 2000 watts at 15 degree beam width making it the preferred
choice for deep water bathymetry. BATHY-2010 is capable of providing sophisticated
algorithms for peak signal detection, automatic modes of: receiver gain, bottom tracking,
pulse length and power level controls greatly reduce the probability of inaccurate bottom
detection/tracking.
Figure 3. Bathymetry data collected in cruise SK-356
Report of Survey- SK356 2019
Page | 8
6.3 CONDUCTIVITY TEMPERATURE & DEPTH (CTD)
The CTD for marine underwater operations
consists of an SBE 9plus underwater unit
and SBE 11plus deck unit. The CTD sensors
in the assemblage are made to fathom the
parameters to a depth of 6,800 meters. It
consists of Paroscientific Digiquartz pressure
sensor (SBE 4) designed for 10,000 psia full
scale range, a single fast and accurate
temperature sensor (model SBE 3 plus) and
the temperature-conductivity ducted flow
with pump-controlled time responses
minimizes spiking in the salinity sensing.
The sensors have a high scanning rate of 24
Hz. The built-in NMEA 0183 interface in the
system integrates the real time GPS data
with the CTD data. The entire unit comes
with an electro-mechanical sea cable
installed on-board with a winch which can
deploy the entire unit to a depth of 6000 meters.
The sensor (SBE 3plus) for logging temperature is provided with a depth resistance of
6800 meters. Temperature measurement range is -0.5° C to +35°C with the fine
resolution of 0.0002° C at a frequency of 24 samples per second with a swift response
time of 0.065 ° 0.010 seconds. Conductivity Sensor (SBE 4C) in the system has
measures conductivity in the range of 0.0 to 7 Seimens/meter (S/m). Resolution of the
sensor is 0.00004 S/m at a frequency of 24 Hz. Response time of the sensor in the
pumping mode is 0.060 seconds. The pressure sensor can endure depth of 10,500 meters.
The resolution is 0.015% of the full scale (can be customized within range of 0 to 10,000
psia). Apart from these PAR sensor (Biospherical PAR: QCP-2300L-HP 70470) with
depth resistance of 10000 meters is provided which records in. Dissolved oxygen sensor
(DO Sensor SBE 43 432425 – unit - mll-1) which uses algorithm by Owens and Millard
(1985) for deriving the DO concentration is designed for depth upto 7000 meters. In
addition, it houses altimeter (Benthos PSA-916D 57889) which measures a depth of
6000 meters. The sensor for light transmission (Transmissometer WETlabs Model: CST-
1563DR) and fluorescence (Fluorometer WETLabs ECO-FL-NTU Model: FLNTURTD-
2826), both can withstand depths of 6000 meters. Moreover the entire housing is having
a rosette of 12 Niskin Samplers (capacity = 5 liters) with manually controlled tripping
mechanism (Manual Fire mode) for collection of water samples from various depths.
Figure 1 : CTD operation
Report of Survey- SK356 2019
Page | 9
Figure 2 : CTD acquisition module
6.4 MAGNETOMETER
The magnetometer used onboard this vessel is a
Cesium Vapour (Optical Pumping) Magnetometer;
manufactured by Geometrics Inc; based in
California; US. The model number was G-882
which belonged to the G-88x series of Geometrics™
Marine Magnetometer. The magnetometer fish is
towed behind the ship at length three times the
length of the ship.
The deck unit is connected to a winch cable via a deck cable. The deck unit is connected
to the computer along with a DGPS. The winch cable is connected to the magnetometer
through a sea cable (towing cable). The signal strength is measured in Volts (V) and the
magnetic field is measured in nanotesla (nT).The output obtained through the Mag Log
Lite software is as follows:
Figure 3 : Magnetometer deployment
Figure 4 Caesium magnetometer
Report of Survey- SK356 2019
Page | 10
7. Feedback/Suggestions
1. Performance of MBES navigation computer has been interrupted many times during
the survey. It is recommended to upgrade /replace the system.
2. Magnetic field values in magnetometer readings are always fluctuating while survey
in North-South/South-North directions. It’s recommended to consult OEM/Service
providers to solve this issue. Keel weight and neck weight not available for Magnetometer as
per specification.
3. Deep sea winch was not operation hence sediment sampling was not able to carry out
during the whole cruise.
4. At the end of the cruise PM addressed some issue and vessel could not achieve optimum
speed and delayed ETA for two days.
5. AC was not working at the end of the cruise.
6. Food and service was excellent. Also the medical support during the voyage is highly
appreciated.
Figure4. Maglog software data logging
Report of Survey- SK356 2019
Page | 11
ACKNOWLEDGEMENT
The whole team of SK-356 place on record their deep sense of gratitude to Director; National
Centre for Polar and Ocean Research; for assigning responsibilities for EEZ survey cruise.
Team is also thankful to Dr. John Kurian P, Mr.Abhishek Tyagi and Mr. M. M. Subramaniam
for their support for the success of SK-356 cruise. The support and co-operation rendered by
NORINCO personnel is specially appreciated. The Scientific team also wishes to thank the
Master and crew of the vessel for their co-operation during the cruise.
8. ANNEXURE
DAIRY OF EVENTS
Date
Time(G
MT)
Events [Lat/Long - dd mmss; SOG- Speed Over
Ground(knots); COG- Course Over Ground(°); D-Depth(m);
WS- Wind Speed (knots); W- Weather]
23.02.2019 15:09 Transect to survey area
24.02.2019 @02:30
17°13.90'N/ 086°21.87'E ; SOG 4.8 ; COG
099;SW’ly/09kts.;Slight
07:00 Magnetometer onboard
07:20 Recording stopped ; 17°10'28" N /86°44'08"E
08:00 start CTD/SVP-01
10:00 CTD/SVP-01 onboard
10:45 SOL-L01 ; 17°10'21"N /86°43'48"E
10:55 Magnetometer deployed
12:42 Magnetometer onboard
25.02.2019 @2:30
17°45.24’N /087°55.23’E ; SOG 4.7 ; COG 063 ; SW’ly/08kts.
;Slight
05:43 EOL-L01,Magnetometer onboard; 17°52'51" N/ 88°10'44"E
05:47 SOL-JL01 ; 17°53'00"N / 88°11'13"E
06:26 EOL-JL01 ; 17°54'06"N/ 88°09'24"E
06:27 SOL-L02 ; 17°54'04"N/88°09'17"E
26.02.2019 @02:30 17°15.96’N /086°46.90’E ; SOG 4.9 ; COG 243 ;S’ly/08kts; Slight
00:42 EOL-L02 ;17°12'33"N/86°44'11"E
00:43 SOL-JL02 ; 17°12'30" N/86°44'03"E
01:11 SOL-L03 ; 17°13'39"N/86°42'16"E
20:30 EOL-L03; 17°54'51"N/88°06'33"E
20:51 SOL-JL03 ; 17°55'36"N/ 88°08'07"E
21:30 EOL-JL03 ; 17°56'54"N /88°06'36"E
21:34 SOL-L04 ; 17°56'58"N/88°06'21"E
27.02.2019 @02:30 17°46.23’N /087°44.57’E ; SOG 4.7; COG 243 ; S’ly/08kts ; Slight
07:17 Magnetometer deployed
16:11 EOL-L04 ; 17°15'12"N/86°41'06"E
16:13 SOL-JL04 ; 17°15'12"N/86°41'06"E
Report of Survey- SK356 2019
Page | 12
16:49 EOL-JL04 ;17°16'17"N/86°39'15"E
16:51 SOL-L05; 17°16'22"N/86°39'18"E
28.02.2019 @02:30 17°36.9’N /087°21.13’E ; SOG 4.7 ; COG 063 ; S’ly/06kts ; Slight
12:04 EOL-L05 ;17°58'21"N/88°05'09"E
12:51 SOL-L06; 17°59'39"N/88°03'50"E
01.03.2019 @02:30
17°28.22’N /086°59.08’E ; SOG 4.9 ;COG 243 ;SE’ly/05kts ;
Slight
07:00 EOL-L06 ; 17°18'15"N/ 86°38'36"E
07:10 SOL-JL06 ; 17°18'15"N/86°38'36"E
08:01 SOL-L07 ; 17°19'37" N /86°36'51"E
02.03.2019 @02:30
18°00.18’N /088°00.33’E ; SOG 4.8 ; COG 063 ;NE’ly/15kts;
Slight
03:06 EOL-L07 ;18°01'30"N/88°03'22"E
03:25 SOL-Transect to CL01 ; 18°02'04"N/ 88°03'31"E
10:57 EOL-Transect to CL01;18°09'21"N/87°25'08"E
11:00 SOL-CL01 ; 18°09'03"N/87°25'12"E
19:00 EOL-CL01 ; 17°39'51"N/87°49'18"E
19:06 SOL-Transect to CL02 ; 17°39'24"N/87°49'37"E
03.03.2019 @02:30 17°22.40’N /087°15.30’E; SOG 4.9; COG 242;NE’ly/09kts; Slight
03:00 EOL-Transect to CL02 ; 17°21'16"N/87°12'44"E
03:02 SOL-CL02 ; 17°21'20"N/87°12'33"E
10:43 EOL-CL02; 17°49'03"N/86°47'28"E
11:01 SOL -
17:34 EOL-Transect to L08 ; 17°21'00"N ; 86°35'27"E
17:35 SOL-L08;17°21'02"N/86°35'32"E
04.03.2019 @02:30 17°40.22'N/087°15.00'E;SOG 4.8;COG 063;SW'ly/06kts;Slight
03:47 Magnetometer onboard; 17°43'00"N//87°20'44"E
04:13 Stopped for CTD/SVP operation
04:40 Started CTD/SVP-02
06:35
CTD/SVP-02 on board ;Magnetometer
deployed;17°43'19"N/87°21'27"E
18:15 EOL-LO8;18°03'57"N/87°01'58"E
18:18 SOL-JL08;18°03'18"N/87°01'39"E
19:09 EOJL-L08;18°03'47"N/87°59'35"E
19:11 SOL-LO9;18°03'47"N/87°59'30"E
05.03.2019 @02:30 17°48.39'N/087°27.52'E;SOG 4.7;COG 243;SW'ly/17kts;Slight
15:16 EOL-LO9;17°22'21"N/86°34'07"E
15:17 SOL-JL09;17°22'19"N/86°34'01"E
15:49 EOL-JL09;17°23'25"N/86°32'10"E
15:50 SOL-L10;17°23'29"N/86°32'14"E
06.03.2019 @02:30 17°48.65'N//087°23.66'E;SOG 4.8; COG 063;SW'ly/13kts;Slight
09:48 EOL-L10;18°05'20"N/87°58'00"E
09:50 SOL-JL10;18°05'24"N/87°58'08"E
10:30 System restarted;18°06'41"N/87°57'22"E
11:30 SOL-L11;18°06'51"N/87°56'46"E
Report of Survey- SK356 2019
Page | 13
07.03.2019 @02:30 17°33.11'N/086°47.52'E;SOG 5.0; COG 243;SW'ly/12kts
06:09 EOL-L11;17°25'08"N/86°31'06"E
06:12 SOL-JL11;17°25'08"N/86°31'06"E
06:47 SOL-L12;17°26'07"N/86°29'01"E
08.03.2019 @02:30 18°07.85'N/087°50.11'E; SOG 5.0; COG 243; NE'ly/10kts;Slight
00:48 EOL-L12;18°08'06"N/87°53'37"E
00:56 SOL-JL12;18°08'24"N/87°55'39"E
01:38 EOL-JL12;18°09'55"N/87°54'23"E
01:40 SOL-L13;18°09'51"N/87°54'12"E
11:52 Magnetometer onboard;17°45'40"n/87°04'44"E
12:02 PM complaint; Survey stopped;17°45'30"N/87°05'18"E
14:55 SOL-L13; Magnetometer deployed;17°46'09"N/87°05'46"E
23:29 EOL-L13;Magnetometer onboard;17°27'51"N/86°28'11"E
Survey completed. Transit to Chennai.
Report of Survey- SK356 2019
Page | 14
Report of Survey- SK356 2019
Page | 15
LIN
E N
O.
BEGINNING OF LINE END OF LINE
DA
TE
TIME
(UTC)
DE
PT
H
LAT (O
) LONG(O
) FILE NAME
DA
TE
TIME
(UTC)
DE
PT
H
LAT(O
) LONG(O
) FILE NAME
L-0
1
24
.2.2
019
10.45 255
6 17°10'21"N 86°43’48”E
L01-
201924Feb
104507.xse
25
.2.2
019
5.43 2168 17°52’05”N 88°10’44”E
L01-
201924Feb
054015.xse
L-0
2
25
.2.2
019
6:27 218
1 17°54'04"N 88°09'17"E
L02-
201925Feb
062719.xse
26
.2.2
019
0:42 2529 17°12'33"N 86°44'11"E
L02-
201926Feb
003853.xse
L-0
3
26
.2.2
019
1:11 253
3 17°13'39"N 86°42'16"E
L03-
201926Feb
011218.xse
26
.2.2
019
20:30 2296 17°54'51"N 88°06'33'E
L03-
201926Feb
202734.xse
L-0
4
26
.2.2
019
21:34 226
6 17°56'58"N 88°06'21"E
L04-
201926Feb
213201.xse
27
.2.2
019
16:11 2541 17°15'12"N 86°41'06''E
L04-
201927Feb
161102.xse
L-0
5
27
.2.2
019
16:51 254
9 17°16'22"N 86°39'18''E
L05-
201927Feb
165112.xse
28
.2.2
019
12:04 2197 17°58'21"N 88°05'09"E
L05-
201928Feb
120453.xse
L-0
6
28
.2.2
019
12:51 220
2 17°59'39"N 88°03'50"E
L06-
201928Feb
125132.xse
1.3
.201
9
7:00 2542 17°18'15"N 86°38'36"E
L06-
201901Mar
065715.xse
L-0
7
1.3
.201
9
8:01 256
3 17°19'39"N 86°36'51"E
L07-
201901Mar
080151.xse
2.3
.201
9
3:06 2204 18°01'38"N 88°03'22"E
L07-
201902Mar
030105.xse
CL
-01
2.3
.201
9
11:00 235
8 18°09'03"N 87°25'12"E
CL01-
201902Mar
110043.xse
2.3
.201
9
11:00 2333 17°39'24"N 87°49'37"E
CL02-
201902Mar
190438.xse
CL
-02
3.3
.201
9
3:02 249
5 17°21'20"N 87°12'33"E
CL02-
201903Mar
030201.xse
3.3
.201
9
10:43 2509 17°49'03"N 86°47'28"E
CL02-
201903Mar
103621.xse
L-0
8
3.3
.201
9
17:35 257
9 17°21'02"N 86°35'32"E
L08-
201903Mar
173448.xse
4.3
.201
9
18:15 2218 18°03'57"N 87°01'58"E
L08-
201904Mar
181104.xse
Report of Survey- SK356 2019
Page | 16
L-0
9
4.3
.201
9
19:11 223
1 18°03'47"N 87°59'30"E
L09-
201904Mar
190156.xse
5.3
.201
9
15:16 2585 17°22'29''N 86°34'07''E
L09-
201905Mar
151411.xse
L-1
0
5.3
.201
9
15:50 259
0 17°23'29"N 86°32'14"E
L10-
201905Mar
155045.xse
6.3
.201
9
9:48 2245 18°05'20"N 87°58'00"E
L10-
201906Mar
094843.xse
L-1
1
6.3
.201
9
11:36 223
5 18°06'51"N 87°56'46"E
L11-
201906Mar
113651.xse
7.3
.201
9
6:09 2594 17°25'08''N 86°31'06''E
L11-
201907Mar
060420.xse
L-1
2
7.3
.201
9
6:47 259
9 17°26'07''N 86°29'01''E
L12-
201907Mar
064734.xse. 8
.3.2
01
9
0:48 2261 18°08'06"N 87°55'04"E
L12-
201908Mar
004410.xse
L-1
3
8.3
.201
9
1:40 227
0 18°09'51"N 87°54'12"E
L13-
201908Mar
014048.xse
8.3
.201
9
23:29 2593 17°27'51''N 86°28'11''E
L13-
201908Mar
232220.xse.
CTD/SVP Stations
Sl No. Date Time Depth(m) Latitude Longitude
1. 24/02/2019 10:00 2562 17⁰10’16” 86⁰43’39”
2. 07/03/2019 6:35 2388 17⁰34’27” 87⁰21’54”
Report of Survey- SK356 2019
Page | 17