Sea Hawk USV

Sea Hawk USV overview

The Sea Hawk is an autonomous unmanned surface vessel (USV) developed by L3Harris Technologies for the United States Navy, emerging from a series of experimental Ghost Fleet Overlord trials and the Navy's Medium Unmanned Surface Vehicle (MUSV) program. At 7.6 meters in length with a displacement hull optimized for open-ocean endurance, the Sea Hawk can operate continuously for 72 or more hours at speeds up to 40 knots, covering maritime patrol zones impossible to sustain with crewed vessels at the same cost. Its autonomy stack incorporates radar, AIS, electro-optical cameras, and LIDAR for collision avoidance and rules-of-the-road maritime navigation, enabling extended unsupervised operation with remote human supervision over satellite datalinks.

The Sea Hawk is engineered around a modular mission payload architecture, allowing rapid reconfiguration for mine countermeasures, anti-submarine warfare sonar deployment, intelligence collection, force protection, and logistics resupply. In the context of the US Navy's Distributed Maritime Operations (DMO) concept, vessels like the Sea Hawk are intended to operate as forward-deployed sensors and effectors within a larger networked fleet, extending the sensor horizon of surface combatants and providing persistent coverage of chokepoints without risking human crews. Exercises conducted in 2022 and 2023 demonstrated the Sea Hawk operating in coordinated formations with other USVs and manned warships in the Pacific, validating the concept of human-machine teaming at the tactical level. The platform represents a pivotal step in the US Navy's transition toward a hybrid crewed/uncrewed fleet structure planned for the 2030s.

Armament

Mission module bays support EO/IR sensors, sonar, mine-hunting systems, and optional strike packages

Development and operational timeline

1. Sep 2019US Navy Ghost Fleet Overlord program formally launches; autonomous USV teaming concept validated in initial at-sea trials
2. Jun 2020L3Harris selected to develop Sea Hawk USV under Navy MUSV competitive contract
3. Mar 2021Sea Hawk completes first extended endurance autonomous transit — 3,000+ nautical miles without crew intervention
4. Nov 2021Mine countermeasures module integration and sonar tow trials completed in Gulf of Mexico
5. Apr 2022Sea Hawk participates in RIMPAC exercises; demonstrates coordinated operations with manned destroyers and P-8 Poseidon aircraft
6. Sep 2022Anti-submarine warfare (ASW) package validated — Sea Hawk tows passive sonar array tracking simulated submarine contact
7. Feb 2023US Navy awards LRIP contract for initial fleet of Sea Hawk USVs; Pacific deployment planned
8. Jul 2023Sea Hawk integrates with MQ-8C Fire Scout helicopter drone for multi-domain patrol — first USV/VTOL UAV teaming in US Navy history
9. Jan 2024Forward-deployed Sea Hawk patrols begin in 7th Fleet area of operations (Western Pacific)
10. Sep 2024Strike module evaluation begins; Sea Hawk tested as launch platform for Hellfire and APKWS rocket systems