Boat Names: Rules, Size & Placement Guide

Most recreational boat owners in the UK are surprised to learn there’s no single law prescribing the exact size or font for a boat name. The requirements depend on how your boat is registered, where you plan to use it, and whether it’s recreational or commercial. Here’s what actually applies.

Do I legally need a name on my boat?

For unregistered recreational craft used purely in UK waters, there is no strict legal requirement to display a name at all — though it’s strongly advisable for safety and identification purposes. HM Coastguard and other emergency services use the vessel name when responding to incidents, and marinas often require it.

If your boat is registered on Part I of the UK Ship Register, the registered name must be displayed on the exterior of the hull. If it’s registered under the Small Ships Register (SSR), a name is not technically mandated by the registration itself, but the SSR number must be marked on the hull.

Where should the name go?

Convention and most marina requirements dictate the name on both sides of the bow and on the stern. On narrowboats and canal cruisers, the name typically appears on both sides of the hull amidships or towards the bow, and often on the stern panel too. On yachts and motorboats, bow and stern are the standard positions.

For Part I registered vessels, the port of registry must also appear on the stern, usually below or alongside the name. This is a legal requirement under Merchant Shipping regulations.

How big should a boat name be?

There is no universally fixed minimum size for recreational vessel names in UK law. The practical standard most commonly cited is a minimum of 75mm (3 inches) in height for names on seagoing vessels, which comes from convention and some local authority requirements rather than a single statute. For inland waterway craft, the Canal & River Trust has no prescribed minimum, but names must be legible.

In practice, the right size depends on the length of the name, the font chosen and the position on the hull. A five-letter name in a clean, open font reads well at 100–150mm. A longer name, or one in a decorative script, may need to be larger to remain legible at distance. We have a detailed guide on boat name sizing with practical recommendations by boat type.

What colour and material?

There is no legal requirement on colour, but the name must be legible — which in practice means it needs to contrast reasonably with the hull colour. White lettering on a white hull, or dark lettering on a dark hull, is clearly impractical. Most owners choose white, gold, black or a complementary colour to the hull scheme.

Vinyl lettering is the most common method for recreational craft. It’s durable, clean-looking and easy to apply. We use 7–10 year grade marine vinyl with UV-stable colours, which holds up well in saltwater and freshwater environments alike. Alternatively, some owners prefer a paint mask stencil for a traditional painted finish.

Narrowboats and canal boats

Canal & River Trust (CRT) licenced craft must have the boat name and index number clearly displayed. The index number — sometimes called the canal boat index number or CBI number — is issued on licensing and must appear on the hull. We supply canal boat index number stickers cut to the required format.

Narrowboat names tend to be larger and more decorative than yacht names, often featuring elaborate lettering, scrollwork and shadow effects. This is part of the traditional narrowboat aesthetic rather than a regulatory requirement.

Choosing a boat name

There’s no restriction on what you can call a recreational boat in the UK, other than the obvious requirement that it not be identical to another registered vessel if you’re registering on Part I. Names are not registered under SSR, so duplication is possible but generally not a practical concern.

Names tend to fall into a few broad categories: place names, personal names, nautical terms, and humorous or punning names. Whatever you choose, it’s worth thinking about how it will look at the size you need — some names and fonts work better at scale than others. If you’re unsure, use our online lettering designer to preview your name in different fonts and sizes before ordering.

Ordering vinyl boat name lettering

We produce vinyl boat names in a wide range of fonts, colours and sizes, supplied with application tape ready to fit. Single-colour names, two-tone, shadowed and outlined styles are all available. Use the lettering designer to build and order your name online, or contact us if you need something custom — an unusual font, a specific size, or a design based on your own artwork.