Quality of being navigable.

plural of navigation

So as to permit navigation.

plural of navigability

(nautical) Navigation by using the positions of the stars and other heavenly bodies.

(nautical) A deeper channel cut into the sea or river bed, to enable larger ships to pass through to a port.

(nautical) Synonym of nautical chart (“maritime map showing characteristics which are relevant for seafarers”)

plural of navigational chart

the science and technology of determining the position of an aircraft with respect to the surface of the earth and accurately maintaining a desired course

The determination of the three-dimensional position and velocity of a spacecraft (relative to a frame of reference)