
Built by Tacoma Boatbuilding Company in 1984
Technical Specifications
Overview
USNS Stalwart (T-AGOS-1) was a Modified Tactical Auxiliary General Ocean Surveillance Ship and the lead ship of her class. Stalwart was laid down on 3 November 1982 by the Tacoma Boat Building Company. She was launched on 11 July 1983 and entered service with the United States Military Sealift Command on 12 April 1984. The ship served as an anti-submarine surveillance ship during the Cold War, then as an anti-drug smuggling vessel as part of the United States' war on drugs. Stalwart left military service on 15 November 2002, and was struck from the Naval Vessel Register on 2 December 2002. She was donated to the State University of New York Maritime College (SUNY-Maritime), and was renamed SUNY Maritime. She was sold in 2011 to Stabbert Maritime and sent to Norfolk Shipyards for restoration and renamed R/V Ocean Stalwart.
Live Tracking
Most time stopped at Belem: 5 d across 6 stays.
Derived from the AIS track: runs of near-zero speed (anchored, moored or drifting) snapped to the nearest port. Builds up as we observe the vessel.
Intelligence
Operational Status
The latest broadcast is too stale or lacks the speed / status to classify.
Read from the single most-recent AIS broadcast we hold for this hull. We keep no position history, so this is a point-in-time posture, not a dwell inference. Derived in-house from our own AIS feed; weight it by the broadcast age above.
Arrivals, time in port and the load/discharge inferred from the draught change, detected from AIS track history. An open call means the vessel is still in port (no departure observed yet).
Method: each call is a run of fixes inside a port’s geofence confirmed by a stop (or an AIS gap); load/discharge is the sign of the draught delta over the call. Indicative: arrivals before our AIS history began read from the first observation.
Time-in-port summed by port from the AIS-detected port-call history: the ports this vessel has spent the most time at, longest first.
Based on 2 completed calls observed since . Open calls (no departure yet) are excluded. The distribution sharpens as AIS history accrues.
Composite Risk
Strong, corroborated adverse evidence: a detention, sanctions exposure or an AIS-gap / behavioural signal.
A coverage-weighted blend of the 3 components we could read for this hull; the weights renormalise over only the components present, so a thin read is never inflated and a hull is never credited a “safe 0” for a signal it has no row for. Higher means riskier. Derived in-house from government-open port-State-control, flag, sanctions and our own vessel data; weight it by the coverage above.
Transparency
Behavioural flags raised against this vessel, each shown with the raw evidence behind it. Derived in-house from data we are entitled to publish; informational, not a determination of wrongdoing.
Stopped transmitting relative to the live feed front
Method: gap measured vs the live feed's own max timestamp, not wall-clock. Source: TheMaritime aisstream.io ingest (ais_positions).
Signals are a current-state view: a flag clears once the vessel stops tripping its detector. These are screening indicators, not a substitute for your own due diligence.

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