Back in Business
#1275Viper 640 · 207 · BOSTYC
751
-8±73
Overall Rank
#1275
of 1822
Percentile
Top 70%
of 1822 boats
Rating
751
Confidence
±73
High
Races
24
Recent Form
+6
avg last 5 races
Last raced: Sep 1, 2025
Rating Over Time
898+2Direct Competitors
Boats Back in Business has raced against most often, with head-to-head finish record.
Race History
24 racesSail Salem Pursuit Regatta 2025
Sep 1, 2025/15 of 31
-8
898
Viper 640 North American Championship · R10
Dec 15, 2024/21 of 30
-8
906
Viper 640 North American Championship · R9
Dec 15, 2024/11 of 30
+25
914
Viper 640 North American Championship · R8
Dec 15, 2024/19 of 30
+7
889
Viper 640 North American Championship · R6
Dec 14, 2024/17 of 30
+13
883
Viper 640 North American Championship · R5
Dec 14, 2024/22 of 30
-5
870
Viper 640 North American Championship · R4
Dec 14, 2024/18 of 30
+7
874
Viper 640 North American Championship · R7
Dec 13, 2024/18 of 30
+6
868
Viper 640 North American Championship · R3
Dec 13, 2024/27 of 30
-43
862
Viper 640 North American Championship · R2
Dec 13, 2024/20 of 30
-13
905
Viper 640 North American Championship · R1
Dec 13, 2024/15 of 30
-11
918
Sail Salem Pursuit Regatta 2023
Sep 4, 2023/7 of 36
+42
929
Viper New Englands · R7
Aug 29, 2021/10 of 13
-19
887
Viper New Englands · R6
Aug 29, 2021/3 of 13
+59
906
Viper New Englands · R5
Aug 28, 2021/5 of 13
+40
847
Viper New Englands · R4
Aug 28, 2021/10 of 13
-29
807
Viper New Englands · R3
Aug 28, 2021/7 of 13
+11
836
Viper New Englands · R2
Aug 28, 2021/7 of 13
+11
824
Viper New Englands · R1
Aug 28, 2021/10 of 13
-49
814
2019 Viper 640 New England Championship · R5
Jun 30, 2019/8 of 17
+23
862
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 (±73) 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.