Voluntary Reporting Area Overview

By vessel type, transiting tonnage since 28 February was led by product tankers at 45 per cent, followed by dry bulk at 22 per cent and general cargo at 14 per cent.

Cellular container (6 per cent), other (5 per cent), Ro-Ro (3 per cent), liquid cargo (3 per cent) and unknown (2 per cent) made up the remainder — a composition that reflects the corridor's role in energy and bulk trades.

Over the last seven days, of the transits still being made the northern PGSA route carried 12 outbound and 15 inbound movements, against six outbound and six inbound using the southern Oman territorial-water route. No full transits used the suspended Traffic Separation Scheme.

Route selection among continuing transits has concentrated on the northern route. These are observations of behaviour, not routing advice, and route choice alone should not be treated as evidence of safety.

Across the wider Voluntary Reporting Area, the Red Sea and Gulf of Aden remained an active incident environment, with 37 piracy-related incidents recorded year to date.

These figures provide regional context alongside the Houthi-related threat covered separately in Trident's Red Sea Maritime Threat Assessment.

Of the 37 piracy-related incidents recorded year to date, seven were categorised as boardings or hijacks and four as attacks; the remaining 26 were suspicious-activity reports.

The distribution is weighted towards suspicious-activity reporting, with a smaller number of boardings, hijacks and attacks. Named-vessel incident detail is held in the full report.

Voluntary reporting recorded 604 GNSS-interference reports year to date, including 61 in the previous 30 days, alongside 34,236 anomalous AIS positions during the seven-day analytical period. Persistent concentrations remained in the Red Sea, Arabian Gulf and Gulf of Oman.

Interference-report concentrations aligned closely with independently observed anomalous AIS positions, increasing confidence that both are observing the same underlying disruption. Voluntary reporting is not a complete representation of interference activity, so absence of reports should not be read as absence of interference.

Transit and route figures are AIS-derived and do not capture EMCOM-silent movements. GNSS figures rest on voluntary reporting, which is incomplete. The overview covers a defined reporting period and should be read as indicative of observed activity rather than a complete account.

The full report contains the detailed tables and methodology; this adaptation summarises its principal findings.