EXPLANATION OF TEMPORARY AND PRELIMINARY NOTICES
Certain Notices to Mariners appearing in the monthly editions have a (T) or (P) appended to the regular number. These letters indicate that the information contained in the notice is of a temporary or preliminary nature.
Similarly, you may ask, what are temporary and preliminary corrections?
Temporary and Preliminary (T & P) corrections are carried out in pencil and are erased after they are canceled or superseded by permanent correction. Navigational warnings are listed under Navareas. A New edition of a chart is issued when the major portion of a chart is revised.
Also Know, what is Admiralty Information Overlay? The Admiralty Information Overlay (AIO) is a data set that contains additional navigation information to mariners. All in force temporary and preliminary Notices to Mariners are displayed in the Admiralty Information Overlay.
Keeping this in view, what is Preliminary Notice to Mariners?
PRELIMINARY (P) NOTICES (a) When important changes affecting navigation are to take place in the near future, a Notice to Mariners describing the change will be published so that the mariners will have advanced information on the change. Such notices will be designated (P).
What is admiralty chart Catalogue?
????The ADMIRALTY Digital Catalogue (ADC) provides a comprehensive and up-to-date reference of ADMIRALTY Maritime Data Solutions, including Standard Nautical Charts and Nautical Publications, as well as AVCS, ARCS, ADMIRALTY ECDIS Services and T&P NMs.