The Collaborative International Dictionary of English v.0.48:
Chartless \Chart"less\, a. 1. Without a chart; having no guide. [1913 Webster] 2. Not mapped; uncharted; vague. --Barlow. [1913 Webster] Chartographic ChartographerWordNet (r) 3.0 (2006):
chartless adj 1: (of unknown regions) not yet surveyed or investigated; "uncharted seas" [syn: chartless, uncharted, unmapped]