navigational chart vs naval chart

navigational chart and naval chart both are nouns.

Word	Noun	Adjective	Verb	Adverb
navigational chart	Yes	No	No	No
naval chart	Yes	No	No	No

As nouns, navigational chart and naval chart are synonyms defined as:

navigational chart and naval chart: a chart for a navigator showing the prevailing meteorological and hydrographic and navigational conditions

Other synonyms of navigational chart include pilot chart.

navigational chart (noun)	naval chart (noun)
a chart for a navigator showing the prevailing meteorological and hydrographic and navigational conditions	a chart for a navigator showing the prevailing meteorological and hydrographic and navigational conditions