This page contains downloadable excel spreadsheets
that do useful calculations.
Be careful - I built these for my own personal use.
It is almost
certain there are errors. I would be interested in hearing about
any errors found or other improvement suggestions.
Coastal Navigation Calculator - also includes some wave calculations
Electrical Calculator - battery bank & alternator sizing,
Voltage Drop
Calculator, and related
wire
sizing calculator
Heat
Calculator - insulation thickness and heater sizing
Hull
structure calculator - for vessels that will encounter significant
ice, based on formulas for ABS Polar class PS7 (Summer/autumn operation
in thin first-year ice which may include old ice inclusions )
Hydraulic
Calculator
Sailing
Loads calculator
Vessel
Calculator - the normal vessel ratios (such as sail area to displacement),
some speed calculations and a prop pitch calculator
Winch
Sizing Calculator
Wind
Calculator - True and Apparent angles, Velocity made good & Tacking
angle
Prototype:
Closest Point of
Approach Calculator - This can be used when you are trying to avoid
a tropical storm. It's mathematically a more complex calculator
than the others, and requires some user adjustments, so may not be as
directly useful to others. But it is a useful and interesting
navigational concept to understand.
Links to other calculators
Engineering Calculators
Electrical Calculators
Sailing Calculators
The Wandering Albatross
Farewell, my friend! I give the luck and cheer;
Seafaring hearts fare always well at sea,
And love makes all things easy. Far or near
I wish thee good, when'er I think of thee;
May winds blow string for thee,
May waves roll long for thee,
The thunderous sea make chant and song for thee
Wherever thou may'st be.
Layard 1897