⚡ Cap Shrouds (Uppers)
27 (Loos A) / 200 kg
Base datum tension for straight mast alignment and headstay support.
⚓ Lower Shrouds
15 (Loos A) / 100 kg
Permits subtle lower mast pre-bend without sideways column buckling.
📏 Mast Rake (Halyard to Transom)
21 ft 1 in (6.43 m)
Standard rake balancing helm feel and maximum upwind pointing.
⛵ Jib Halyard & Barber Hauler
Firm / 50mm Inhaul
Jib luff tight without overtension scallops; leech parallel to centerline.
🎯 Mainsail Outhaul & Cunningham
15mm from band / Light Cunningham
Draft centered at 45-50% chord with smooth entry and flat exit.
🔄 Kicker / Vang & Traveler
Snug on beat / Center Traveler
Maintains leech profile through waves; traveler on centerline.
💡 Medium Air Tactical & Trim Notes
Optimum power band for the Squib. Focus on smooth crew kinetics with crew hiking firmly on the coaming. Keep the boat sailing flat (under 12° heel) for maximum keel lift and speed. Sheet the main firmly to bring the top telltale flying 70% of the time.
Squib LOA: 5.8m (19.0 ft)
Multiplier accounts for maneuvering room between boats
Standard club & regional race duration (45–60 min)
Used to estimate Squib Upwind VMG (~4.5 - 5.2 kts)
🎯 Recommended Start Line Length
120 m
21 Squib Boat Lengths (~131 yards)
⛵ Target Windward Leg Length
0.85 NM
~1,574 meters (1st Beat target ~12-14 min)
⏱️ Total Course Distance & Laps
3.2 NM
Estimated ~3 Laps (Windward/Leeward)
Length Overall (LOA)
5.79 m
19 ft 0 in
Waterline Length (LWL)
4.88 m
16 ft 0 in
Beam
1.87 m
6 ft 2 in
Draft
1.00 m
3 ft 3 in (Iron Fin Keel)
Total Displacement
680 kg
1,499 lb (Min weight)
Keel Weight
290 kg
639 lb ballast
Mainsail Area
9.3 m²
100 sq ft
Jib Area
3.9 m²
42 sq ft
Spinnaker Area
18.0 m²
194 sq ft
RYA Portsmouth Yardstick
1068
Handicap Rating
| True Wind (TWS) | Upwind Speed (BSP) | Opt. Upwind TWA | Downwind Speed | Opt. Downwind TWA | Tack Angle |
|---|---|---|---|---|---|
| 6 kts (Light) | 4.1 – 4.3 kts | 42° – 44° | 4.4 – 4.7 kts | 142° – 148° | ~74° |
| 10 kts (Moderate) | 4.7 – 4.9 kts | 40° – 42° | 5.2 – 5.5 kts | 148° – 152° | ~70° |
| 14 kts (Medium) | 5.1 – 5.3 kts | 38° – 40° | 5.9 – 6.2 kts | 152° – 156° | ~68° |
| 18 kts (Fresh) | 5.3 – 5.5 kts | 39° – 41° | 6.4 – 6.8 kts | 160° – 165° | ~70° |
| 22+ kts (Heavy) | 5.4 – 5.6 kts | 41° – 43° | 7.2 – 8.0+ kts | 165° – 170° | ~72° |
Documentation, rigging guidelines, maintenance procedures, and technical references for National Squib class owners and crews.
Squib Owners Manual
User manual style guide covering boat preparation, rigging specifications, maintenance procedures, class rules, and tuning notes for the National Squib one-design keelboat.