How to keep your admiralty charts to up-to-date (NP294). 

 - Fourth edition. 
 - 64 pages :  ill. maps ;  29 cm. 
<br/><br/><label>ISBN: </label>978-0-70-774-0560 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nautical Charts.