Length Overall (LOA or o.a.) is the maximum length of a vessel's hull, measured parallel to the waterline from the foremost point (bow) to the aftermost point (stern). It is the primary measurement used for docking, marina fees, and mooring allocation. Generally, it excludes removable attachments like bowsprits or davits.

Key Aspects of Length Overall (LOA):
Measurement Scope: Measures the extreme length of the hull, often defined as "deck level".

What it Excludes: In many contexts, it specifically excludes bowsprits, rudders, outboard motors, and swim platforms.

What it Includes: Integrally formed or welded components, such as molded swim platforms, are usually included.

Docking and Storage: Crucial for calculating marina berth fees (e.g., per metre).

Distinction from LWL: Distinguishes from Length Waterline (LWL), which is the length of the hull in the water.

Note: Sometimes LOA is confused with "Length Over Spars" (LOS), which includes bowsprits and booms.