Skip to main content
Same-day production • Nationwide shipping • Call (386) 227-6695
SAME DAY VINYL

California boat lettering guide

California Boat Registration Number Requirements

A clear guide to California boat registration number size, placement, spacing, color contrast, and validation decal positioning.

Where California Boat Numbers Go

Display numbers on both sides of the forward half, as high above the waterline as practical. The number should remain visible, legible, and free from other markings that could make it hard to identify.

Custom Boat Registration Number Decals example from Same Day Vinyl

Core Display Requirements

  • Use the state prefix CF exactly as assigned on your registration.
  • Use plain block characters at least three inches high.
  • Read the complete number from left to right.
  • Use a strongly contrasting color against the hull or background panel.
  • Separate letter and number groups with hyphens or spaces equal to a character width.

Validation Decal Placement

Place the registration sticker three inches aft of the number. Install decals only after cleaning and drying the surface, and keep them visible for inspection.

Official Source and Accuracy

Last reviewed August 29, 2026. This page is a practical summary, not legal advice. Confirm current instructions with California Division of Boating and Waterways. Official source: https://dbw.parks.ca.gov/pages/28702/files/dbwboatcourse.pdf

Order Durable Boat Number Decals

Same Day Vinyl produces marine-grade, application-ready boat registration lettering and ships throughout all 50 states. Enter your assigned number carefully, choose a contrasting color, and confirm the finished layout before ordering.