ISSF ProActive Vessel Register

The ProActive Vessel Register, or PVR, is one of the public vessel lists that ISSF provides to foster transparency in tuna fishing. This list connects responsible fishers and seafood companies. Fishing vessels can register on the PVR to show how they are following practices that support sustainable tuna fisheries.

The PVR tracks detailed vessel information, including with respect to certain fishing activities. MRAG Americas, a third-party independent auditor, audits all vessels that join the PVR.

Longline and purse seine vessels that register on the PVR also need to ensure that their skippers do one of the following:

  1. Attend an in-person and/or online ISSF Skippers Workshop on bycatch mitigation practices, or
  2. Attend an in-person Skippers Workshop provided by a tuna Fishery Improvement Project (FIP) and conducted by a trainer that has been accredited by ISSF to conduct these workshops; or
  3. View an ISSF Skippers Workshop video online; or
  4. Review the relevant ISSF Skippers’ Guidebook, which contains information on bycatch handling and mitigation, RFMO requirements, and other useful information about fishing sustainably. Skippers’ Guidebooks can be read online at or downloaded from this site.

If you are assigned to a longline vessel on the PVR, the following Webpage will display those actions that the vessel has committed to undertaking as part of joining the PVR: https://www.iss-foundation.org/vessel-and-company-commitments/proactive-vessel-register/proactive-vessel-register-pvr/pvr-vessel-list/

These actions, known as ISSF Conservation Measures, are detailed in the following section.

Other ISSF Public Vessel Lists

Other ISSF public vessel lists are:

  • Vessels in Other Sustainability Initiatives (VOSI): The VOSI is the only publicly available list of tuna fishing vessels that are part of a Fishery Improvement Project or fishing in an MSC-certified fishery. Other voluntary efforts by fishing vessels are also displayed, such as having Electronic Monitoring systems (EMS) that meet the minimum standards. This list is a tuna-sourcing tool for seafood companies.
  • Tuna Vessel IMOs and Other UVI Numbers (IMO/UVI): This comprehensive list shows tuna vessels with either International Maritime Organization (IMO) or other Unique Vessel Identifier (UVI) numbers. IMO and UVI numbers help to reduce illegal fishing activities.
  • Record of Large-Scale Purse Seine Vessels (LSPSR): The LSPSR lists all large-scale purse-seine vessels fishing for tuna that are compliant with ISSF capacity conservation measures. This consolidated global view of the large-scale purse-seine fleet supports both ISSF and RFMO efforts to prevent overfishing.