Saryu Class Naval Offshore Patrol Vessels (NOPV)

The Saryu Class Naval Offshore Patrol Vessels (NOPVs) are designed and constructed by Goa Shipyard for the Indian Navy. The first two NOPVs are operational with the Indian Navy, while the next two are scheduled to enter service by 2014.

The Saryu Class NOPVs can be deployed for ocean surveillance and monitoring India’s sea lines of communication (SLOC) and exclusive economic zone (EEZ), and protection of offshore oil field infrastructure and offshore national assets.

The Saryu Class vessels can also be tasked with surface warfare operations, escort of high value vessels, fleet support operations and anti-piracy patrols.

Saryu Class NOPV development and deliveries

The Saryu Class NOPVs were designed by the in-house design team of Goa Shipyard. The first NOPV in the series, INS Saryu, was launched in March 2009 and handed over to the Indian Navy in December 2012. The vessel was inducted into the Indian Navy in January 2013.

The second vessel, INS Sunayna, was launched in November 2009 at the Goa Shipyard and commissioned by the Indian Navy in October 2013.

The third and fourth OPVs in the class, INS Sumedha and INS Sumitra, were launched in May 2011 and December 2010 respectively.

Saryu Class design and features

The Saryu Class vessel incorporates a modern steel hull and complies with the standards of ABS and IRS. Each of the Saryu Class vessels can carry 118 crew members including 16 officers and 102 sailors.

The 105m-long vessel has a width of 12.9m, moulded depth of 6m and mean draught of 3.6m. The vessel has a displacement of 2,215t and can load 300t of fuel oil, 60t of fresh water, 10t of lubricating oil and 30t of AVCAT aviation fuel.

The OPV also features auxiliary systems, including oily bilge water separator, sewage and vacuum toilet system, and two fresh water generation systems producing 30t of water a day each.

The deck machinery fitted to the vessel includes two high holding power (HHP) anchors, each of 1,440kg, two electro-hydraulic cranes for 6.5m rigid inflatable boats (RIB), two anchor capstans and a mooring capstan.

The aft flight deck allows the Saryu Class vessel to support the operations of a multirole helicopter. The vessel can carry an advanced light helicopter (ALH) or a Sea King helicopter, and has aviation facilities such as Helo traversing gear, Helo landing grid, hangar for ALH and landing facility for ALH.

Saryu Class navigation and communication

The Saryu Class features a radar communication system incorporated with an automatic radar plotting aid (ARPA), differential global positioning system (DGPS), gyro compass, magnetic compass, echosounder, speed log and auto pilot.

The vessel is also equipped with an electronic chart display and information system (ECDIS) and communications in accordance with Global Maritime Distress and Safety System (GMDSS) A3 regulations.

Armament of the Saryu Class

The armaments of the Saryu Class include a 76mm Ottomelara super rapid gun mount (SRGM), which is equipped with a fire control system (FCS). The gun has the capacity to fire 120 rounds a minute.

The NOPVs are also armed with two 30mm close-in weapon systems (CIWS) and chaff launchers to deceive incoming missiles.

Saryu Class NOPV engine and performance

The Saryu Class NOPV runs on two diesel engines, each driving a controllable pitch propeller through a reduction gearbox. Each engine produces a maximum power of 7,790kW.

The active fin stabilisation system on the vessel minimises the roll motion and increases the stability of the vessel.

The NOPV is also fitted with an 80KVA auxiliary genset as an emergency power system. The maximum speed provided by the propulsion system is 25kt, and the range is 6,000nmi at 16kt. The vessel can conduct uninterrupted missions for a normal period of 20 days and an extended period of 60 days.

---

---

Damen Stan 4207 Patrol Vessel, The Netherlands

The Damen Stan type 4207 patrol vessels, designed by Damen Shipyard Group, are operated by a number of navies and coast guards across the globe.

Vishwast Offshore Patrol Vessel (OPV), India

Vishwast Class offshore patrol vessels are a new generation patrol boats operated by the Indian Coast Guard (ICG). The vessels are designed and built indigenously by Goa Shipyard Limited (GSL).

---