Eight Second Ride

#1626

Viper 640 · 220 · HYC

630
±81
Overall Rank
#1626
of 1826
Percentile
Top 89%
of 1826 boats
Rating
630
Confidence
±81
High
Races
43
Recent Form
-3
avg last 5 races
View all Viper 640Compare
Last raced: Nov 2, 2025

Rating Over Time

792

Race History

43 races

About the Rating

Ratings are computed using Glicko-2, a chess-style system that considers who you beat and who beat you. Winning against higher-rated boats earns more points than beating lower-rated boats.

The overall rank compares this boat to all others across every class. To see how it stacks up within its class, use the “View all Viper 640” link above.

The confidence band (±81) shows how certain we are about this rating. It narrows as more races are completed and widens during periods of inactivity.

The shaded area on the chart represents the 95% confidence interval — the true skill of this boat likely falls within that range.