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Request Pre-Charter InspectionAbout B4
M/Y B4 is a 31.5m motor yacht built by Astondoa in 2005. She accommodates 12 guests, 6 staterooms, a reported crew of 5. This vessel has not been independently verified by YachtBenchmark — the score shown is provisional and based on publicly available specifications only.
Key Specifications
Build & Design
Amenities
Water Toys & Equipment
Tenders
About This Score
This is a provisional score based on publicly available data only. Unlike verified yachts, this listing lacks:
- Independent on-board inspection
- Crew qualification verification
- Maintenance record audit
- Safety equipment inspection
The actual safety profile may differ significantly.
Provisional scores are calculated from eight factors: vessel age, refit recency, classification society, flag state, crew-to-guest ratio, builder reputation, vessel size, and charter region coverage. All provisional scores are capped at 75/100. Learn how scores work →
Scoring model v5 · Last scored Feb 2026
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