The Caliber 47 LRC Sailboat
Specs & Key Performance Indicators

Published Specification for the Caliber 47 LRC

Underwater Configuration: Fin keel & skeg-hung rudder

Hull Material: GRP (Fibreglass)

Length Overall: 46'10" (14.3m)

Waterline Length: 36'2" (11.0m)

Beam: 13'2" (4.0m)

Draft: 5'3" (1.6m)

Rig Type: Cutter

Displacement: 30,000lb (13,608kg)

Designer: Michael McCreary

Builder: Caliber Yachts (USA)

Year First Built: 1999

Published Design Ratios for the Caliber 47 LRC

1. Sail Area/Displacement Ratio: 15.8

• Less than 16 would be considered under-powered;
• 16 to 20 would indicate reasonably good performance;
• Over 20 suggests relatively high performance.

2. Ballast/Displacement Ratio: 39.4

• Under 40: less stiff, less powerful
• Over 40: stiffer, more powerful

3. Displacement/Length Ratio: 239

• Under 100: Ultralight
• 100 to 200: Light
• 200 to 275: Moderate
• 275 to 350: Heavy
• Over 350: Ultraheavy

4. Comfort Ratio: 39.0

• Under 20 indicates a lightweight racing boat
• 20 to 30 indicates a coastal cruiser
• 30 to 40 indicates a moderate offshore cruising boat
• 40 to 50 indicates a heavy offshore boat
• Over 50 indicates an extremely heavy offshore boat

5. Capsize Screening Formula: 1.6

• Under 2.0 (the lower the better): Better suited for ocean passages
• Over 2.0: Less suited for ocean passages

read more about these Key Performance Indicators...

Summary Analysis of the Design Ratios for the Caliber 47 LRC

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1. A Sail Area/Displacement Ratio of 15.8 suggests that the Caliber 47 LRC will need a stiff breeze to get her going. In light conditions, unless you've got plenty of time on your hands, motor-sailing may be the way to go.

2. A Ballast/Displacement Ratio of 39.4 means that the Caliber 47 LRC will initially stand up reasonably well to her canvas in a moderate breeze, but she'll need a reef in the main to avoid heeling excessively in a gust.

3. A Displacement/Length Ratio of 239, tells us the Caliber 47 LRC is a moderate displacement cruiser, which means she'll carry all your cruising gear without it having a dramatic effect on her performance. Most of today's sailboats intended for offshore cruising fall into this displacement category.

4. Ted Brewer's Comfort Ratio of 39.0 suggests that crew comfort of a Caliber 47 LRC in a seaway is similar to what you would associate with the motion of a moderate bluewater cruising boat - a predictable and acceptable motion for most seasoned sailors.

5. The Capsize Screening Formula (CSF) of 1.6 tells us that a Caliber 47 LRC would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0.