Coastline Coverage is the complete coverage of land access to open deep water sources. Lengthy coastlines require a larger financial and material commitment concerning self-defense and, as a result, many nations have developed amphibious assault forces and specialized coastal patrol craft to minimize a concentrated attack from the sea. For the purpose of the GFP ranking, a lengthy coastline coverage requires a heightened commitment to self-defense and, as such, island nations are particularly vulnerable.
The values below are displayed in Kilometers (km). Landlocked nations (ex: Austria) are not included in this list nor penalized for lacking coastline.
Sources: CIA.gov, CIA World Factbook, wikipedia.com, public domain print and media sources and user contributions. Some values may be estimated when official sources are lacking.