Which document is required for all vessels to comply with safety regulations as established by MARPOL?

The document required for all vessels to comply with safety regulations established by MARPOL is the International Safety Management (ISM) Code certificate. This certificate is crucial because it ensures that vessels are managed according to an internationally recognized safety management system. The ISM Code promotes safe practices in shipping and ensures the protection of the environment, which is closely aligned with MARPOL's objectives to prevent pollution from ships.

While the Safety of Life at Sea (SOLAS) certificate, Ship Inspection Report Program (SIRP) document, and Vessel Traffic Service (VTS) clearance are significant in their respective areas of maritime safety and operations, they do not specifically address the comprehensive safety management aspects required under MARPOL regulations. SOLAS primarily focuses on safety at sea and the construction and equipment standards of ships, while SIRP relates to inspection protocols, and VTS clearance deals with navigational safety rather than overall vessel management and environmental compliance. Thus, the ISM Code certificate is the document that directly aligns with and fulfills the requirements set by MARPOL for vessel safety and environmental protection.