Chart Symbols Ref

Symbols Overview
General introduction and key concepts of symbols
Symbols Types
Common types and categories of symbols
Symbols Best Practices
Recommended approaches and guidelines for symbols
Symbols Common Mistakes
Frequent errors to avoid with symbols
Symbols Quick Reference
Essential values and measurements for symbols
Symbols Comparison
Compare different options and variations of symbols
Symbols Standards
Industry standards and specifications for symbols
Symbols Safety
Safety considerations and precautions for symbols
Symbols Tools Required
Equipment and tools needed for symbols
Symbols FAQ
Frequently asked questions about symbols
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About Chart Symbols

What this tool does

Marine tools calculate hull speed, fuel burn rate at various RPMs, anchor rode length, displacement, sail area, tide times, and sea distances between ports.

Why use this tool

Boating safety depends on correct calculations. Not enough anchor rode in a squall means dragging anchor. Underestimating fuel burn means running dry offshore. These tools help you plan passages with proper safety margins.

How it works

Hull speed uses the formula 1.34 x sqrt(waterline length in feet). Anchor rode applies the 7:1 scope ratio for moderate conditions. Fuel burn estimates interpolate from engine RPM and consumption curves.

Pro tip

In heavy weather, increase your anchor scope to 10:1 or more. The holding power of an anchor depends almost entirely on the angle of pull, and more rode keeps that angle close to horizontal.

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