Friday, August 22, 2025

Hull Identification Numbers (HINs)

For the avoidance of duplication here and hopefully on Flikr and the Facebook group where the question comes up occasionally.

Hull Identification Numbers (HINs) are a structured number identifying the maker of a boat and some other information (see below). It was introduced after the Achilles boats were made and was not mandatory until 1998. Butler would never have had a makers number etc so the boats can not have a formal HIN.

At the factory hulls were not generally identified the original sail number being the hull number.

The Google AI description looks to be correct:


A boat's Hull Identification Number (HIN) is a unique 12 or 14-character code that serves as a serial number for the boat, similar to a Vehicle Identification Number (VIN) for a car. It's used to identify the boat and track it for various purposes, including registration, defect notifications, and sales.

Key aspects of a HIN:


Permanent Marking: The HIN is permanently etched or molded into the boat's hull, typically on the starboard side of the transom and also hidden elsewhere on the boat.

Structure: The HIN typically includes a manufacturer's code, a unique serial number, and sometimes details about the year and place of manufacture.

Historical Context: HINs were introduced in the US in 1972 and in the EU in 1998.

Relevance to Recreational Craft Directive (RCD): The RCD requires all boats built after 1998 to have a HIN, which helps in ensuring compliance with safety and environmental standards.

Manufacturer's Identity Code (MIC): For boats built in the UK, the MIC is a unique three-letter code identifying the manufacturer, registered with British Marine.

Uses: HINs are used for registration, tracking recalls, and facilitating boat sales.

My note: usually asked for by insurance companies, the SSR and others but like all vintage boats there is nothing to give.

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