FORCETALLY
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Measured figures
Configuration
| Specification | Sandhayak-class survey ship (1981) | Type 912 degaussing/deperming ship |
|---|---|---|
| Builders | Garden Reach Shipbuilders and Engineers Goa Shipyard, Ltd.[source] | — |
| Operators | India[source] | — |
| Succeeded by | Makar class[source] | — |
| Planned | — | |
| Completed | — | |
Beam
Single source12.8 m (42 ft 0 in)[source]
full
Single source1,929 long tons (1,960 t) full[source]
officers + 160 enlisted
Single source18 officers + 160 enlisted[source]
Maximum; Speed
Single source16 knots (30 km/h; 18 mph)[source]
at 10 kn (19 km/h; 12 mph)
Single sourceat 14 knots (26 km/h; 16 mph)
Single source6,000 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)[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
| Active |
|---|
| — |
| Retired | — |
|---|
| Type | Hydrographic survey ship[source] | Degaussing / deperming ship (ADG)[source] |
|---|
| Armament | 1 × Bofors 40 mm gun[source] | Unarmed[source] |
|---|
| Aircraft carried | 1 × HAL Chetak helicopter[source] | None[source] |
|---|
| Aviation facilities | Helipad[source] | None[source] |
|---|
| Source measurement | The Sandhayak -class survey ships are a series of eight vessels built by Garden Reach Shipbuilders and Engineers (GRSE), Kolkata and Goa Shipyard , Vasco for the Indian Navy . While Sandhayak , Investigator , Nirdeshak , Nirupak were built in GRSE; Sarveshak , Jamuna , Darshak , Sutlej were built by Goa Shipyard. The vessels equipped with four survey motorboats , 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.[source]Sandhayak-class survey ship (1981) · Lead; only the objects and conditions stated in this passage The third ship in the class Nirupak was decommissioned after 38 years of service on 29 January 2024 in Visakhapatnam .[source]Sandhayak-class survey ship (1981) · Service history; only the objects and conditions stated in this passage | — |
|---|
| Country of origin | India[source] India[source] India[source]Inventory Origin column; table 11, row 8, cell 7; revision 1376895978; retrieved 2026-10-02 | — |
|---|
| Propulsion | two diesel engines[source]Unspecified | Marine Diesel[source] |
|---|
| Status | — | Active[source] |
|---|
| Sensors & processing systems | — | Navigation radar[source] |
|---|
| Electronic warfare & decoys | — | None[source] |
|---|
| Armour | — | None[source] |
|---|