Sandhayak-class survey ship

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Sandhayak class
Exercise Milan 2014 for 17 navies of the Indian Ocean Naval Symposium, organised by Indian Navy, Andaman and Nicobar Command (9).jpg
INS Investigator during Exercise Milan 2014
Class overview
Operators:  India
General characteristics
Type: Hydrographic survey ship
Displacement: 1,929 long tons (1,960 t) full
Length: 87.8 m (288 ft 1 in)
Beam: 12.8 m (42 ft 0 in)
Draft: 3.3 m (10 ft 10 in)
Speed: 16 knots (30 km/h; 18 mph)
  • 6,000 nmi (11,000 km; 6,900 mi) at 14 knots (26 km/h; 16 mph)
  • 14,000 nmi (26,000 km; 16,000 mi) at 10 kn (19 km/h; 12 mph)
Complement: 18 officers + 160 enlisted
Armament: 1 × Bofors 40 mm gun
Aircraft carried: 1 × HAL Chetak helicopter
Aviation facilities: Helipad

The Sandhayak-class survey ships are a series of eight vessels built by Garden Reach Shipbuilders and Engineers (GRSE), Kolkata and Goa Shipyard, Ltd., Vasco for the Indian Navy. While Sandhayak, Investigator, Nirdeshak, Nirupak were built in GRSE;[1] Sarveshak, Jamuna, Darshak, Sutlej were built by Goa Shipyard [2] The vessels equipped with four survey motor boats, two small boats and are powered by two diesel engines with a top speed of 16 knots (30 km/h; 18 mph). They have a helicopter deck and are also armed with a Bofors 40 mm/60 gun mount for self-defense.

The ships are equipped with variety of next-generation surveying systems fitted onboard including multi-beam swath echo sounding system, differential gps, motion sensors, sea gravimeter, magnetometer, oceanographic sensors, side scan sonars, automated data logging system, sound velocity profiling system, digital survey and processing system, amongst others.[3]

Working as part of Indian Naval Hydrographic Department the Sandhayak-class survey ships are equipped with a range of surveying, navigational and communication systems. The ships are designed to undertake shallow coastal and deep oceanic hydrographic survey and collect oceanographic and geophysical data required for the production of digital navigational charts and publications. Besides carrying out their primary role of hydrographic survey, they can also assist in times of war and natural calamities as troop transports and casualty holding ships. The ships are also equipped with ROV, AUV & USV.[4] Nirdeshak was decommissioned in 2014.[5]

Ships in the class[edit]

INS Nirdeshak
Ships in the class
Name Pennant No. Date of Commission Homeport Status
Flight I
INS Investigator J 15 11 January 1990 Kochi[6] Active
INS Jamuna J 16 31 August 1991 Kochi Active
INS Sutlej J 17 19 February 1993 Kochi Active
INS Sandhayak J 18 14 March 1981 Vizag Active
INS Nirdeshak J 19 4 October 1982 Vizag Decommissioned
INS Nirupak J 20 14 August 1985 Vizag Active
Flight II
INS Darshak J 21 28 April 2001 Vizag[7] Active
INS Sarvekshak J 22 14 January 2002 Kochi[8] Active

See also[edit]


  1. ^ "GRSE_Coffee Table Book_low.pdf" (PDF).
  2. ^ Saunders 2002, p. 316.
  3. ^ "Indian navy ship on goodwill visit".
  4. ^ "INS Sarvekshak".
  5. ^ "Fortnightly E-News Brief of National Maritime Foundation" (PDF).
  6. ^ "Kochi to be home for survey ship INS Investigator". OnManorama. 30 May 2019.
  7. ^ "Navy deserter caught at the Mumbai airport". mid-day. Retrieved 9 June 2016.
  8. ^ "Kashmir students arrive in Kochi on a goodwill visit". The Hindu. 18 September 2011. ISSN 0971-751X. Retrieved 9 June 2016.
  • Saunders, Stephen (2002). Jane's Fighting Ships 2002–2003. Coulsdon, UK: Jane's Information Group. ISBN 0-71062-4328.

External links[edit]

External images
Sandhayak class survey ship
INS Sandhayak
INS Sutlej
INS Darshak