The standard fishing zone is defined as the main range of deepths in which the "métier" is practised.

We standardised and grouped all the available fishing zone data, as follow :

Four standard categories were defined covering all the bathymethries frequented by the artisanal fleets. They are the following:

(*) Valid only if the given range doesn't respect the condition of Coastal waters or Deep waters.

Coastal waters: in this category all the depths under 75 m and mostly under 50 meters depth have to be included (example 1 in the table).

Medium range: all depths below 150 meters and mostly included in the range of depths between 50 and 150 meters (example 2 in the table).

Deep waters: all depths greater than 100 meters and mostly up 150 meters (example 3 in the table).

Wide range: all depths cover a large range starting under 100 meters up to deep waters (example 4 in the table)

Missing data: in the case in which the minimum depth and/or the maximum depth is not recorded (example 5 in the table).