Notice to Mariners

Question 1

What is Notice to Mariners?

Answer 1

• Notice to Mariners are updates sent from the hydrographic office to the mariner with the latest updates for charts and publications

Weekly Notices

• Updates for standard navigation charts
• Navigation warnings
• Updates for sailing directions
• Updates for ALOL
• Updates for ALRS

Cumulative

• Two vols released in Jan and July
• List of all chart corrections and new editions in the past two years

Annual Summary of Notice to Mariners

• Summary of T’s and P’s in force
• Summary of corrections to sailing directions over the last 12 months

Question 2

What are T’s and P’s?

Answer 2

• A temporary notice is a short-term change that will affect navigation
• A preliminary notice is issued for important changes that will happen in the near future. They will affect navigation but full information is not available.

These are not permanent changes, therefore, are written in pencil on the chart