LED lighting, soundproof, Sailor's Solutions Inc.      
Marine Calculators
Hull Speed
Maximum Speed of a Single-Hull Displacement Boat

Hull Speed = 1.34 * (LWL)1/2
  
What's your boat's length of waterline in feet?  
 

Boat Speed
If your speed log is disabled, you can calculate the boat's speed by determining the time it takes for a wood chip or other floating object to pass from the bow to the stern. If you want to retrieve the object, attach a string to it.

Boat Speed = (60 (sec/min) * 60 (min/hr) * length of boat in feet) /
( 6076.1 (feet/nautical mile)* seconds for chip to pass)
How long is your boat in feet?
How long does it take for a light object to reach the end of the boat in seconds?
 

Sail Area Displacement Ratio
This ratio indicates how fast the boat is in light wind. The higher the number the faster the boat.
10-15Cruiser
16-20Cruiser-Racer
21-24Racer
> 24Performance Racer

Sail Area Displacement Ratio = Sail Area / ( Displacement Volume )2/3
Displacement Volume in Cubic Feet = Weight in Pounds / 64
What is the area of your sail in square feet?
How heavy is your boat in pounds?
 

product<br>image
Lifeline AGM Deep Cycle Marine Battery
12 Volt (Size)24 (Capacity)80 Amp Hr

Charges deeper, faster and without maintenance!
Will not spill or leak!
$279.95
product<br>image
WiFi SignalMaker™ Onboard WIFi hi-gain amplifier and base station
Make your WiFi fast and reliable with our 9 dB hi-gain base station
$399.95
product<br>image
SmartLock outboard motor lock for engines to 35/40 HP (with clamp screws).

Keep your engine safe from thieves!
$79.95
product<br>image
Stay-Dry Vacuum Containers
Keeps things dry as a bone!
$29.95
product<br>image
60-100-SR-IG alternator, ARS-5-H regulator, MC-TS-A Alternator Temp Sensor, MC-TS-B Battery Temp Sensor
Everything you need to upgrade your Yanmar,Perkins or other saddle mount dual foot alternators to the most efficient charging system for AGM or flooded cell batteries

Charge faster Charge better!
$939.95
product<br>image
Signal Mate 3 NM LED Anchor Light with Photocell that Turns light on at Dusk and off at Dawn
Compact and rugged Designed for many years of operation Made in USA!
On Sale Now. MSRP $246.00, Now $199.95!
$199.95
product<br>image
Velcro® Brand Marine Grade Hook and Loop,
2-inch-wide, waterproof adhesive-back. Sold by the foot in white or black

Solve onboard mounting problems fast! A little goes a long way!
$4.99
product<br>image
SCAD Sensibulb™ LED Light - LED cabin light bulb replacement Made in USA!
Jan '09 Practical Sailor's Highest Lumen Output!The Brightest output LED system, pleasing color, broad focus, very low battery draw. Fits into vertical and horizontal fixtures! Zero radio interference!
$34.95

Go to top of page.