Gibson tanker report – Clean-to-Dirty

The latest Gibson Shipbrokers report highlights a significant shift in tanker operations, noting that clean-to-dirty switching gained momentum in Q4 2025. Driven by evolving geopolitical tensions, this trend has accelerated throughout recent months, forcing tanker operators to reconsider fleet deployment strategies. As vessels transition from carrying refined products to crude oil, shipowners must navigate complex logistical hurdles. This operational pivot reflects broader volatility in global energy markets, requiring precise cargo planning and vessel management to maintain efficiency across international shipping routes.

Transitioning a vessel from clean petroleum products to dirty crude oil requires strict adherence to MARPOL Annex I regulations regarding oil discharge monitoring and equipment standards. Compliance departments must ensure that tank cleaning procedures meet the rigorous requirements outlined in SOLAS Chapter II-2 concerning fire safety and inert gas systems. Furthermore, classification society standards for cargo containment and piping integrity are paramount. Failure to document these conversions correctly can lead to severe port state control deficiencies and significant operational delays during inspections at major global hubs.

This operational shift directly impacts masters and chief engineers who must oversee the complex tank cleaning and ballast water management processes. These officers must ensure that cargo segregation protocols are strictly followed to prevent contamination. Navigating officers are required to update voyage plans and cargo manifests to reflect the change in vessel status. Maintaining detailed records of these conversions is essential for ensuring vessel safety and regulatory compliance during upcoming port calls.