report of survey- sk356npdc.ncaor.gov.in/npdc/cruisdatadownload.jsp... · 5. geodetic parameters...

Report of Survey- SK356 2019

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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


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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-


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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


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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


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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


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(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


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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


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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


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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


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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


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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


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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


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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.


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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


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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”


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