Accident/incident categories

L - Aviation accidents and incidents
R - Rail accidents and incidents
M - Marine accidents and incidents
Y - Other accidents and incidents
S - Safety study

Investigation identifier

Each investigation is designated by an identifier that consists of three parts, such as L2012-09.

- The first part refers the accident category (L, R, M, Y or S).

- The second part refers to the year of the accident.

- The third part is a sequence number referring to the order of the accident within its accident category in the year in question.