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A Crossing is a Path that crosses from a Coastline, Offshore or Mid-Ocean margin to an opposite margin via a recognisable point and can be divided into 2 variants.

A Crossing is also a variant of a Crossing Path.

Greenland Crossings can be further divided into 4 variants.

CROSSING

A Crossing of Antarctica:

has a minimum of 90 degrees of arc between start and end, or...
starts on the Ronne-Filchner Ice Shelf (or associated islands) and ends on the Ross Ice Shelf (or associated islands), or vice versa
touches the ACSA (see Definitions)

A Crossing of the Arctic Ocean:

has a minimum of 90 degrees of arc between start and end
touches the Northern Poles Line (see Definitions)

A Crossing of Greenland:

includes a minimum of 400km in linear distance
has a minimum of 90 degrees of arc between start and end in relation to the Ice Divide (see Definitions)
starts and ends at margins that can be justified as opposite
crosses or parallels the Ice Divide
see Greenland Crossing Variants for more options

Crossing variants: Full Crossing; Crossing; Inland Crossing; Mid-Ocean Crossing

Examples: Crossing of Antarctica, Full Crossing of Greenland

DOUBLE CROSSING

A Double Crossing, typically of Greenland or its ice sheet, must include a minimum of 800km in linear distance and reach opposite coastlines.

Double Crossing variants: Full Double Crossing; Double Crossing; Inland Double Crossing; Mid-Ocean Double Crossing

Example: Double Crossing of Greenland

GREENLAND CROSSINGS

Greenland's oblong shape requires unique classification criteria with 4 variants.

Greenland crossings are not obliged to use variant descriptors, all can be labelled Crossing of Greenland or Greenland Crossing (so long as general Path criteria are satisfied).

Other oblong-shaped regions, such as Baffin Island, should use the same classification guidelines.

Latitudinal Greenland Crossing

A straight line connecting the start and end points of a Latitudinal Greenland Crossing is 22.5º angle or less in relation to a line of latitude.

Latitudinal Crossing variants: Full Latitudinal Crossing; Latitudinal Crossing; Inland Latitudinal Crossing; Double Latitudinal Crossing

Diagonal Greenland Crossing

A straight line connecting the start and end points of a Diagonal Greenland Crossing is greater than 22.5º angle in relation to true north/south and a line of latitude.

Diagonal Crossing variants: Full Diagonal Crossing; Diagonal Crossing; Inland Diagonal Crossing; Double Diagonal Crossing

Longitudinal Greenland Crossing

A straight line connecting the start and end points of a Longitudinal Greenland Crossing is 22.5º angle or less in relation to true north/south.

Longitudinal Crossing variants: Full Longitudinal Crossing; Longitudinal Crossing; Inland Longitudinal Crossing; Double Longitudinal Crossing

North-South or South-North Greenland Crossing

The start and end points of a North to South or South to North Greenland Crossing are above and below latitudes 80º and 62º north respectively.

NS/SN Crossing variants: Full NS/SN Crossing; NS/SN Crossing; Inland NS/SN Crossing; Double NS/SN Crossing

COMPLETE GUIDELINES AND DEFINITIONS