Emergency wreck marking

A new danger is a recently discovered obstruction not yet indicated in nautical documents. It can be natural, such as rock or shoal, or human-created, such as a wreck. It does not mean only an accident occurring today, nor necessarily a blue/yellow buoy. R1001 and RBMN Articles 14–16 address these dangers. The figure presents the particular emergency identity and light-cycle duration without location, route or deployment instruction. Temporary status relates to communication and management of the danger rather than a fixed number of days invented for all installations.

An emergency wreck mark has equal numbers and dimensions of blue and yellow vertical stripes, four to eight around the body. Our flat projection is conceptual rather than a manufacturing drawing or count of hidden faces. The fitted topmark is a yellow upright/perpendicular cross, a plus form rather than diagonal X. The body is pillar or spar. Those distinctions separate emergency from special marks even where both contain yellow and an upper cross. Orientation is part of identity, not a decorative variant interchangeable to fit a design.