If you operate a fishing-charter or livery vessel in Maine, your boat carries three layers of markings: USCG documentation or state registration numbers, a state validation decal from the Maine Department of Inland Fisheries and Wildlife, and any commercial / livery identifiers. This guide explains the rules, sizing, placement, and what vinyl survives harsh coastal winters and salt spray.
Registration Numbers
Vessels registered in Maine display a number in the format XX 1234 YY on each side of the bow. Standard rules:
- Character height: 3 inches minimum
- Style: block letters / numerals, no script
- Contrast: color that contrasts the hull background
- Separation: hyphen or space between prefix, number, suffix
- Reading: left to right on each bow
USCG-documented vessels skip the state number but must display the documented vessel number inside the hull and the official name + hailing port externally.
Maine Validation Decal
The Maine Department of Inland Fisheries and Wildlife issues a validation decal at registration / renewal. It mounts on each side of the bow, within 6 inches of the registration number, in line with the number. Replace at every renewal.
Charter & For-Hire Markings
USCG-licensed charter captains operating six-pack (under-six-passenger) or inspected vessels follow USCG marking rules first, then state. Most Maine charter operators display:
| Marking | Required? | Placement |
|---|---|---|
| State registration # or USCG doc # | Yes | Bow each side / hull interior |
| State validation decal | Yes | Within 6″ of bow number |
| Vessel name + hailing port (USCG) | If documented | Stern |
| Charter business name / phone | Optional / brand | Stern, transom, hull side |
Livery / Rental Requirements
Livery vessels (rentals) typically need additional identifiers; owner / operator name, a livery designation, and emergency contact info. Confirm specific Maine sizing with the Maine Department of Inland Fisheries and Wildlife before printing.
Marine-Grade Vinyl
Salt water, UV, and harsh coastal winters and salt spray are brutal on standard sticker vinyl. Spec to look for:
- 6-mil cast marine vinyl with UV-stable inks
- Pre-spaced application tape for clean alignment
- Apply above waterline, on clean / wax-free gel coat
Frequently Asked Questions
How big do registration numbers have to be on a Maine charter boat?
USCG and most state rules require 3-inch block characters on each side of the bow, in a color contrasting the hull, with a hyphen or space separating prefix, numbers, and suffix.
Where does the Maine validation decal go?
The Maine Department of Inland Fisheries and Wildlife validation decal goes within 6 inches of the registration number on each side of the bow, in line with the number, exact rule from the Maine Department of Inland Fisheries and Wildlife.
Do livery vessels have additional marking rules?
Most states (including Maine) require livery / rental vessels to display the word LIVERY or RENTAL on each side, plus the operator’s name. Confirm with the Maine Department of Inland Fisheries and Wildlife for current sizing.
What vinyl holds up on a saltwater charter in Maine?
Premium 6-mil cast marine vinyl with a UV laminate is rated for 6 to 7 years through harsh coastal winters and salt spray. Apply to a clean, waxed-free hull above the waterline.
Order Maine Boat & Charter Lettering
Hoosier Decal prints registration numbers, hailing port lettering, and charter-business decals on premium 6-year marine vinyl that handles harsh coastal winters and salt spray.
