navigational chart vs pilot chart

navigational chart and pilot chart both are nouns.

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

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

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

Other synonyms of navigational chart include naval chart.

navigational chart (noun)	pilot 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