Based on analyzing the scattering rules of hitting point of ship-to-air missile against aerial target, mathematic model of hitting probability of single missile is given.

Provisions available in local shops have to be flown into Nunavut on one of the most costly air networks in the world, or brought by supply ship during the few ice-free weeks of summer.

Although the cost of shipping goods from Nanjing and other mainland airports has fallen dramatically, high fuel prices continue to make it more attractive to ship large cargo by sea rather than air.