Near Vertical Incidence Skywave (NVIS) communication is a technique used in amateur ("ham") radio to establish reliable short-range to medium-range radio communications.

•NVIS communication involves using antenna configurations and frequencies that allow radio signals to be sent straight up into the ionosphere and then reflected back down to cover a circular area with a radius of approximately 20 miles to 400 miles. This method is often used for local and regional communication where line-of-sight or longer-distance propagation is less effective.

•NVIS communication is particularly useful for emergency and disaster communications where traditional long-distance transmissions may be hindered.