What do the letters and numbers on a boat mean

Boat owners must display their vessel's registration number clearly. See how to display it correctly below.

The owner of a registered recreational vessel, other than personal watercraft, must ensure that the identification mark (assigned by VicRoads) is painted or displayed:

  • on each side of the hull of the vessel
  • forward of the beam
  • so that the highest part of each digit commences at a point no more than 75 mm below the gunwale
  • in characters that are:
    • no less than 150 mm high
    • in proportionate breadth
    • coloured in contrast to the surface on which they are displayed.

See our personal watercraft page for details of PWC registration label requirements.

Recreational tenders

A recreational tender is required to display the name of its mother ship or the registration number of that vessel and the letter ‘T’.

A recreational tender is a vessel that: does not exceed 4.8 m in length; and is used as a means of transport within 300 m of its mother vessel to the shore or another vessel.

The owner of a registered personal watercraft must ensure that the assigned identification mark is painted or displayed:

  • on each side of the hull of the vessel
  • forward of the beam
  • so that the highest part of each digit commences at a point no more than 25 millimetres below the gunwale
  • in characters that are:
    • no less than 100 mm high - in proportionate breadth
    • coloured in contrast to the surface on which they are displayed.

Hull identification number

A hull identification number (HIN) is permanently affixed to a boat’s hull.

It includes a unique national serial number along with information regarding the country of origin, and either manufacturer, model and year of production details for new boats, or an authorised agent code and the year it was affixed.

A HIN is not required for vessels to be registered in Victoria. However, if your vessel has a HIN affixed you must provide the number during the registration process.

Attaching a HIN to a vessel

Visit the Boating Industry Association website for advice on the use, or acquisition, of a HIN.

The sticker is colour coded and contains the month and year of expiry. It must be fixed to left side of your boat near the registration numbers.

You need to buy your own registration numbers which should be a plain block design with no slanting.

If the boat exterior is not white, each digit should have a 7mm minimum of white around it.

What do the letters and numbers on a boat mean

If you love the water and want to purchase a boat, then it is important to know that having your boat registered, unlike a car, is done differently in different states. Certain states will either have you register with the division of motor vehicles, the parks division or the fish and game department. Once you have your registration, understand how to read it, because you will need to have part of the information properly attached to your vessel.

Items you will need

  • -Any one of these documents: Manufacturer's statement of origin (if your boat is new), Carpenter's Certificate, Bill of Sale (from dealer or previous owner), Title, OR Affidavit of ownership

  • -Application

  • -Form of payment

Find the four bold numbers on your registration card. These registration numbers correspond with the same numbers engraved in the hull of the vessel.

Look for the name of the boat manufacturer. This name appears to the right of the registration number on your card. In addition, you will notice a serial number, a certificate number and date registered.

Find the owner number, owner's name and address on the bottom of the Registration card.

Interpreting the registration on the boat is just as important as the piece of paper that you have in your wallet. Just like a VIN number for your car, three sets of letters and numbers are attached to the bow of the boat. The first two letters are the identify the state the boat is registered in. The two sets of letters and numbers following the state ID are registry numbers.

What do the letters and numbers on a boat mean

One thing we often get asked to do is registration numbers that are not up to the standard that RMS requires in New South Wales, so we thought we would do a quick post explaining what is and isn't allowed so you don't get in trouble on the water.

The NSW RMS requirements are as follows:

SIZE: The registration numbers need to be 150mm high if they are on a power boat, or can be 100mm high if they are on a sail boat or jet-ski

LOCATION: For a yacht the number can be on the transom (stern, back). For a power boat they need to be placed either s

ide. Note, it doesn't say at the bow, so you can put them really wherever you want as long as they are visable. So they can be either side of the cabin, or either side on the stern.

FONT: The font has a couple of requirements and this is what often is misunderstood.

The font can't be just outlines of the letters. Yes, there are many boats with these, but that doesn't mean they meet the requirements.

The font also need to be something clearly readable. Script fonts and complex handwritten or funky fonts are often then not very suitable. Remember, a registration number is like a number plate on a car, it needs to be clearly legible.

The letters all need to be in an upper case. Quite often customers want the "N" at the end of the NSW boat registations to be made 1/2 the size of the rest of the letters, especially in the case of a custom registration number. This technically isn't legal as the letters need to be 150mm high as per above details on sizing.

COLOUR: Last but not least, the colour needs to be contrasting the vinyl wrap we put on your boat, or the paint/gelcoat in the section the decal is going over. For example, white or silver on a dark blue wrap, or dark blue or black on a light coloured wrap.

The exact wording and link to the RMS website with the requirements:

Registration numbers
Registered vessels are assigned a registration number. This number must be displayed at all times on both sides of the hull, in figures at least 150mm high (100mm for Personal Watercraft (PWC) and sailing vessels). Sailing vessels may display their registration number on the transom.
The registration numbers must be displayed in a contrasting colour to the hull, in solid characters (not outlines), in a clear font or style and in upper case, so that they can be clearly identified.

Hopefully you found this helpful! If you have questions or want us to do you up a custom registration number design, please contact us!