National Institute of Oceanography Dona Paula, Goa – 403 004

Cruise Report: MDV (Leg-1 to Leg-4)

From 12/11/2013 to 12/12/2013

Bathymetry and Sub-seabed Survey off Malvan-

Devgad-Vijaydurg, West Coast of India

Project Coordinator

Name: Dr. AK Chaubey

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Participants and Itinerary: (a) Leg-1A & 1B

S. No. Name of the participants Designation

1 Dr. A.K.Chaubey Chief Scientist 2 Prakash Marathe Principal Tech. Officer 3 Shri. G.A. Walker Sr. Tech. Officer (3) 4 Shri. Areef Sardar Sr. Tech. Officer (2) 5 Shri. D.K. Naik Sr. Tech. Officer (3) 6 Shri. K.M. Dubey Junior Research Fellow

Itinerary of the boat: Leg-1A: Embarkation MFB Phalguni at Malvan: 12/11/2013 at 07:00 hrs. (IST) Disembarkation MFB Phalguni at Malvan: 14/11/2013 at 18:00 hrs.(IST) Leg-1B: Embarkation MFB Phalguni at Malvan: 16/11/2013 at 07:00 hrs. (IST) Disembarkation MFB Phalguni at Malvan: 18/11/2013 at 18:00 hrs.(IST) (b) Leg-2A & 2B

S. No. Name of the participants Designation 1 Shri. V. Mahale Scientist 2 Shri. V. Khedekar Principal Tech. Officer. 3 Shri. G. M. Phadthe Sr. Tech. Officer (3) 4 Shri. S.S. Gaonker Sr. Tech. Officer (3) 5 Shri. S. Vaz Technical Officer 6 Shri. K.M. Dubey Junior Research Fellow

Itinerary of the boat: Leg-2A: Embarkation MFB Phalguni at Malvan: 20/11/2013 at 07:00 hrs. (IST) Disembarkation MFB Phalguni at Malvan: 22/11/2013 at 18:00 hrs.(IST) Leg-2B: Embarkation MFB Phalguni at Malvan: 24/11/2013 at 07:00 hrs. (IST) Disembarkation MFB Phalguni at Devgad: 26/11/2013 at 18:00 hrs.(IST)

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(c) Leg-3A & 3B

S. No. Name of the participants Designation 1 Dr. A.K. Chaubey Chief Scientist 2 Shri. P. Marathe Principal Tech. Officer. 3 Shri. S.S.Gaonker#/ Shri. G.A. Walker* Sr. Tech. Officer (3) 4 Shri. Areef Sardar Sr. Tech. Officer (2) 5 Shri. G.Tirodkar Technical Officer 6 Shri. D.Srinivas Project Assistant

Itinerary of the boat: Leg-3A: Embarkation MFB Phalguni at Devgad: 28/11/2013 at 07:00 hrs. (IST) Disembarkation MFB Phalguni at Devgad: 30/11/2013 at 18:00 hrs. (IST) Leg-3B: Embarkation MFB Phalguni at Devgad: 02/12/2013 at 07:00 hrs. (IST) Disembarkation MFB Phalguni at Vijaydurg: 04/12/2013 at 18:00 hrs. (IST) * Shri G.A. Walker arrived Devgad on 01.12.2013 for Leg 3B survey and continued thereafter. # Shri S.S. Gaonkar left from Devgad to Goa on 01.12.2013 after completion of Leg 3A. (d) Leg-4A & 4B

S. No. Name of the participants Designation 1 Shri. V. Mahale Scientist 2 Shri. D. Gracias Principal Tech. Officer. 3 Shri. G. M. Phadthe Sr. Tech. Officer (3) 4 Shri. G.A. Walker Sr. Tech. Officer (3) 5 Shri. S. Vaz Technical Officer 6 Shri. Rajeev Yadav Project Assistant

Itinerary of the boat: Leg-4A: Embarkation MFB Phalguni at Vijaydurg: 06/12/2013 at 07:00 hrs. (IST) Disembarkation MFB Phalguni at Vijaydurg: 08/12/2013 at 18:00 hrs.(IST) Leg-4B: Embarkation MFB Phalguni at Vijaydurg: 10/12/2013 at 07:00 hrs. (IST) Disembarkation MFB Phalguni at Vijaydurg: 12/12/2013 at 18:00 hrs.(IST)

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Boat’s complement: Sr. No. Name of the crew Designation

1 Milan Bhanudas Patil Manager 2 Ulhas Jagannath Meher Tandel 3 Hanif Osman Nariya Tandel 4 Vaidya Kunal Bhupendra## Deckhand 5 Sarad Baburao Cook 6 Subhash Raghunath Davare Deckhand

##Vaidya Kunal Bhupendra participated during the survey till 22.11.2013 only. Objective of the survey: Seabed and sub-seabed investigations comprising bathymetry and high resolution

shallow seismic off Malvan-Devgad-Vijaydurg to study seismic stratigraphy and Paleo-

drainage pattern during the Quaternary period.

Project No: OLP1207 Data Acquisition: Bathymetry and sub-bottom profiling surveys between ~12 m and ~65 m water depth

were carried out to investigate the seabed and sub-seabed off Malvan-Devgad-

Vijaydurg along proposed survey tracks (Fig. 1) using echosounder and high-

resolution shallow seismic system. For conducting the survey, standard survey

procedures were followed using following equipment:

(i) Beacon ready Differential Global Positioning System for positioning and

navigation.

(ii) Dual frequency (33 and 210 kHz) echosounder for bathymetry.

(iii) High resolution shallow seismic digital sparker system for sub-bottom profiling.

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Fig. 1 Survey tracks off Malvan-Devgad-Vijaydurg (MDV) along which bathymetry and shallow seismic data were acquired.

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A fishing boat 'MFB Phalguni' from Mumbai was hired to carry out the survey. The

boat arrived from Mumbai at Old Goa Jetty on 08.11.2013. After installation of

equipment and trial survey, the boat sailed to Malvan on 10.11.2013 and arrived at

Malvan on 11.11.2013. The survey commenced from Malvan on 12.11.2013 and

continued till 12.12.2013. In the following sections, a brief description about the data

acquisition is presented.

Navigation data

Differential Global Positioning System (DGPS) manufactured by Trimble (Model 4000

SE) along with the differential beacons (operating in 283.5 to 325 kHz band) was used

for the positioning during the survey. The system, being differential, overcomes the

error caused by disturbances in ionosphere - troposphere and other errors. The

system comprised of two GPS receivers, Pro Beacon receiver [antenna and pre

amplifier, antenna cables and radio receiver]. The Pro Beacon receiver uses

advanced digital signal processing technique to track and demodulate the signals from

DGPS's radio beacon.

The navigation data was logged using windows based HYPACK® software during the

survey. The HYPACK® software provides tools to (i) design preplanned survey track

lines, (ii) navigate along the planned track lines, (iii) provide position data to other

geophysical systems (echosounder and high resolution sub-bottom profiler), (iv) log

raw position and depth data and (v) realize the quality control in real time navigation.

Continuous monitoring of navigation data quality was carried out online using display

system both at recording room and wheel house of the vessel.

All data were recorded on hard disk of the recording computer and later copied to the

portable hard disc. The time stamping to navigation, bathymetry and shallow seismic a

data was accomplished in Greenwich Mean Time (GMT) provided by the Global

Positioning System (GPS) receiver clock throughout the survey.

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Bathymetry data

Atlas Deso-30 single beam echosounder with frequency transducer of 33 kHz was

used to acquire depth data along track lines. The system was interfaced with

navigation system for digital depth logging and event generation. The data was

additionally logged as a hard copy on a built-in thermal recorder.

In hydrographic surveying, depth is determined from observation of 'two way travel

time' of reflected acoustic waves from seabed. An acoustic pulse transmitted by a

transducer, travels through the water column and is then reflected by the target

(seabed) back to the receiver transducer. Depth is calculated from the measured

travel time as given below:

Depth = C*(T/2)

where “C” is the sound speed in the water. Basic echosounder measures the two way

travel time (T) through water column.

Shallow seismic data

High resolution seismic system comprising of energy source CSP D700 & multi-tips

squid spark array, data acquisition unit Octopus 760 and 20 element hydrophone

array from M/s Applied Acoustics, UK was used to acquire sub-bottom information in

the survey area. The seismic data was acquired along the tracks (Fig. 1) using 300

joules energy at a recording frequency band of 250-2500 Hz at a boat speed of ~4.0

knots.

Chief Scientist Name: A.K. Chaubey Sign: ________________ MDV (Leg-1 to Leg-4)

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FORMAT FOR SUBMISSION OF INFORMATION FOR UNDERWAY DATA ACQUISITION DURING CRUISE

Name of Boat: MFB Phalguni Cruise No: Malvan-Devgad-Vijaydurg survey

Cruise Period: From 12/11/2013 to 12/12/2013 Name of Chief Scientist: Dr. A.K. Chaubey

Area of Operation: Offshore Malvan, Devgad & Vijaydurg, west coast of India

Line ID Beginning of Line End of line Type of data

collected

Person responsible for data

Date Time (GMT)

Lat (DDMMSS)

Long (DDMMSS)

Date Time (GMT)

Lat (DDMMSS)

Long (DDMMSS)

MDV-01 12/11/13 07:20 15°58’23” 73°26’17” 12/11/13 10:44 15°52’16” 73°13’04” SBP + WD

Dr. A.K Chaubey

MDV-02A 12/11/13 10:58 15°53’07” 73°12’29” 12/11/13 12:08 15°55’30” 73°17’40” SBP + WD

MDV-02B 13/11/13 01:57 15°55’20” 73°17’18” 13/11/13 04:27 15°00’05” 73°27’32” SBP + WD

MDV-03 13/11/13 05:58 16°00’48” 73°26’45” 13/11/13 09:32 15°53’55” 73°11’50” SBP + WD

MDV-04A 13/11/13 09:46 15°54’47” 73°11’20” 13/11/13 12:57 16°00’40” 73°24’01” SBP + WD

MDV-05A 14/11/13 02:06 16°02’51” 73°26’27” 14/11/13 04:16 15°59’02” 73°18’04” SBP + WD

MDV-05B 14/11/13 06:32 15°58’54” 73°17’47” 14/11/13 08:15 15°55’21” 73°10’08” SBP + WD

MDV-06A 14/11/13 08:28 15°56’13” 73°09’37” 14/11/13 10:24 16°00’42” 73°19’17” SBP + WD

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MDV-07 16/11/13 03:54 16°05’06” 73°26’14” 16/11/13 07:44 15°57’21” 73°09’38” SBP + WD

Dr. A.K Chaubey

MDV-08 16/11/13 07:59 15°58’04” 73°08’52” 16/11/13 12:04 16°06’06” 73°26’06” SBP + WD

MDV-09 17/11/13 02:01 16°07’15” 73°26’09” 17/11/13 06:15 15°59’09” 73°08’43” SBP + WD

MDV-10 17/11/13 06:32 15°59’58” 73°08’08” 17/11/13 11:06 16°08’25” 73°26’19” SBP + WD

MDV-11 18/11/13 01:47 16°09’24” 73°26’03” 17/11/13 06:15 16°00’32” 73°06’53” SBP + WD

MDV-11X 18/11/13 06:25 16°00’13” 73°07’06” 18/11/13 08:58 16°00’02” 73°17’44” SBP + WD

MDV-06B 18/11/13 09:00 16°00’03” 73°17’50” 18/11/13 10:50 16°04’00” 73°26’23” SBP + WD

MDV-12X 20/11/13 04:22 16°02’37” 73°23’22” 20/11/13 07:40 16°01’17” 73°06’51” SBP + WD

MDV-12 20/11/13 07:46 16°01’29” 73°06’34” 20/11/13 12:12 16°10’02” 73°24’49” SBP + WD

MDV-13 21/11/13 02:04 16°11’09” 73°25’00” 21/11/13 06:28 16°02’35” 73°06’30” SBP + WD

MDV-14 21/11/13 06:46 16°03’29” 73°06’03” 21/11/13 11:00 16°11’43” 73°23’49” SBP + WD

MDV-15A 21/11/13 11:15 16°12’43” 73°23’35” 21/11/13 12:11 16°10’57” 73°19’44” SBP + WD

MDV-16 22/11/13 01:22 16°13’37” 73°23’12” 22/11/13 05:23 16°05’46” 73°06’09” SBP + WD

MDV-15B 22/11/13 05:38 16°04’51” 73°06’36” 22/11/13 08:48 16°11’19” 73°20’33” SBP + WD

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MDV-15BX 22/11/13 08:49 16°11’18” 73°20’41” 22/11/13 10:52 16°02’51” 73°26’41” SBP + WD

Dr. A.K Chaubey

MDV-17 24/11/13 05:55 16°15’10” 73°23’55” 24/11/13 09:56 16°06’51” 73°06’06” SBP + WD

MDV-18A 24/11/13 10:11 16°07’41” 73°05’32” 24/11/13 12:48 16°13’12” 73°17’20” SBP + WD

MDV-20 25/11/13 02:48 16°17’45” 73°22’26” 25/11/13 06:49 16°09’43” 73°05’04” SBP + WD

MDV-19 25/11/13 07:02 16°08’48” 73°05’32” 25/11/13 10:47 16°17’05” 73°23’25” SBP + WD

MDV-18B 25/11/13 10:58 16°16’10” 73°23’50” 25/11/13 11:32 16°15’06” 73°21’31” SBP + WD

MDV-18C 26/11/13 01:54 16°16’06” 73°23’41” 26/11/13 03:31 16°12’53” 73°16’43” SBP + WD

MDV-21A 26/11/13 04:18 16°15’34” 73°15’16” 26/11/13 06:47 16°10’42” 73°04’48” SBP + WD

MDV-22 26/11/13 07:05 16°11’32” 73°04’15” 26/11/13 11:07 16°19’52” 73°22’12” SBP + WD

MDV-23 28/11/13 03:29 16°20’54” 73°22’04” 28/11/13 07:55 16°11’54” 73°02’35” SBP + WD

MDV-24A 28/11/13 08:09 16°12’49” 73°02’09” 28/11/13 09:51 16°16’32” 73°10’11” SBP + WD

MDV-24B 28/11/13 10:06 16°16’34” 73°10’13” 28/11/13 12:30 16°21’41” 73°21’12” SBP + WD

MDV-26 29/11/13 01:44 16°23’59” 73°21’22” 29/11/13 06:07 16°15’08” 73°02’20” SBP + WD

MDV-26X 29/11/13 06:26 16°14’57” 73°02’26” 29/11/13 08:57 16°15’28” 73°15’07” SBP + WD

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MDV-21B 29/11/13 09:00 16°15’32” 73°15’19” 29/11/13 11:39 16°19’05” 73°22’55” SBP + WD

Dr. A.K Chaubey

MDV-25 30/11/13 01:39 16°22’59” 73°21’37” 30/11/13 06:20 16°13’43” 73°01’42” SBP + WD

MDV-27A 30/11/13 06:52 16°15’29” 73°00’40” 30/11/13 09:47 16°21’33” 73°13’46” SBP + WD

MDV-27B 30/11/13 09:51 16°21’39” 73°14’01” 30/11/13 11:24 16°24’53” 73°21’00” SBP + WD

MDV-29 02/12/13 03:27 16°26’57” 73°20’37” 02/12/13 07:59 16°17’27” 73°00’09” SBP + WD

MDV-28 02/12/13 08:13 16°16’27” 73°00’19” 02/12/13 12:34 16°26’01” 73°21’04” SBP + WD

MDV-30 03/12/13 01:49 16°27’53” 73°20’18” 03/12/13 06:13 16°18’31” 73°00’03” SBP + WD

MDV-31 03/12/13 06:30 16°19’13” 73°59’08” 03/12/13 11:04 16°28’47” 73°19’49” SBP + WD

MDV-32A 03/12/13 11:18 16°29’43” 73°19’29” 03/12/13 12:00 16°28’22” 73°16’31” SBP + WD

MDV-32B 04/12/13 01:41 16°28’40” 73°17’08” 04/12/13 06:00 16°20’18” 73°59’06” SBP + WD

MDV-33 04/12/13 06:14 16°21’11” 73°58’36” 04/12/13 10:29 16°29’36” 73°16’48” SBP + WD

MDV-35 06/12/13 04:57 16°32’35” 73°18’23” 06/12/13 08:52 16°24’15” 73°00’22” SBP + WD

MDV-36A 06/12/13 09:07 16°25’09” 73°59’60” 06/12/13 11:48 16°30’35” 73°11’46” SBP + WD

MDV-33A 07/12/13 01:49 16°30’32” 73°18’43” 07/12/13 02:33 16°28’56” 73°15’18” SBP + WD

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MDV-34 07/12/13 03:43 16°31’36” 73°18’40” 07/12/13 07:46 16°22’50” 73°59’45” SBP + WD

Dr. A.K Chaubey

MDV-36B 07/12/13 10:33 16°30’11” 73°10’53” 07/12/13 12:29 16°34’03” 73°19’10” SBP + WD

MDV-38 08/12/13 01:34 16°36’05” 73°18’44” 08/12/13 06:16 16°26’13” 73°57’25” SBP + WD

MDV-37 08/12/13 06:31 16°25’12” 73°57’35” 08/12/13 10:48 16°35’02” 73°18’57” SBP + WD

MDV-40 10/12/13 02:53 16°38’17” 73°18’45” 10/12/13 07:37 16°28’09” 73°56’48” SBP + WD

MDV-39A 10/12/13 07:51 16°27’04” 73°56’52” 10/12/13 10:46 16°33’49” 73°11’27” SBP + WD

MDV-39B 10/12/13 10:49 16°33’55” 73°11’37” 10/12/13 12:28 16°37’23” 73°19’09” SBP + WD

MDV-42 11/12/13 02:30 16°40’33” 73°18’46” 11/12/13 07:28 16°29’53” 73°53’44” SBP + WD

MDV-41 11//12/13 07:41 16°28’48” 73°55’48” 11/12/13 12:40 16°39’33” 73°19’02” SBP + WD

MDV-43 12/12/13 01:11 16°41’27” 73°18’21” 12/12/13 06:06 16°30’02” 73°53’39” SBP + WD

MDV-99A 12/12/13 06:14 16°30’01” 73°53’54” 12/12/13 09:12 16°32’24” 73°08’58” SBP + WD

MDV-99B 12/12/13 09:14 16°32’24” 73°09’00” 12/12/13 11:07 16°34’02” 73°19’32” SBP + WD

SBP: Sub Bottom Profiling using Sparker System, WD: Water Depth using Single Beam Echosounder.

Signature of Chief Scientist. Signatures of all persons responsible for data