This infographic, updated in January 2026, tracks the growth in registrations on ISSF’s Vessel in Other Sustainability Initiatives (VOSI).
It shows growth in number and by vessel type — purse seine, longline, pole-and-line, and supply-and-tender — from 2020 through 2025.
VOSI is a transparency tool for the public — including seafood companies that want to understand which tuna vessels have made public commitments to more sustainable fishing beyond the commitments reflected on ISSF’s ProActive Vessel Register (PVR).
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