Marks 1 : (1) Indications on a lead line showing the depth of the water. (2) Buoys or other navigation aids marking a channel or obstruction. (3) Letters, numbers or symbols placed on packages for identification
Association of Marine Underwriters of San Francisco (AMUSF), Glossary of Marine Insurance and Shipping Terms, http://www.amusf.com/Definitions_A.htm, CA, USA 2011. (Mrtm Insur and Shipping - Amer) {575}