▁oct ant ▁in ▁order ▁to ▁provide ▁for ▁the ▁lun ar ▁distance ▁method . ▁ ▁With ▁the ▁lun ar ▁distance ▁method , ▁mar in ers ▁could ▁determine ▁their ▁longitude ▁accur ately . ▁ ▁Once ▁chron ometer ▁production ▁was ▁established ▁in ▁the ▁late ▁ 1 8 th ▁century , ▁the ▁use ▁of ▁the ▁chron ometer ▁for ▁accurate ▁determ ination ▁of ▁longitude ▁was ▁a ▁vi able ▁alternative . ▁Chron om eters ▁replaced ▁lun ars ▁in ▁wide ▁usage ▁by ▁the ▁late ▁ 1 9 th ▁century . ▁ ▁In ▁ 1 8 9 1 ▁rad ios , ▁in ▁the ▁form ▁of ▁wireless ▁te legraph s , ▁began ▁to ▁appear ▁on ▁ships ▁at ▁sea . ▁ ▁In ▁ 1 8 9 9 ▁the ▁R . F . ▁Matt he ws ▁was ▁the ▁first ▁ship ▁to ▁use ▁wireless ▁communication ▁to ▁request ▁assistance ▁at ▁sea . ▁Using ▁radio ▁for ▁determ ining ▁direction ▁was ▁investig ated ▁by ▁" S ir ▁Oliver ▁L odge , ▁of ▁England ; ▁Andre ▁Bl ond el , ▁of ▁France ; ▁De ▁Forest , ▁Pick ard ; ▁and ▁Stone , ▁of ▁the ▁United ▁States ; ▁and ▁Bell ini ▁and ▁T osi , ▁of ▁Italy ." ▁ ▁The ▁Stone ▁Radio ▁& ▁Te legraph ▁Company ▁installed ▁an ▁early ▁prototype ▁radio ▁direction ▁find er ▁on ▁the ▁naval ▁col lier ▁Leb anon ▁in ▁ 1 9 0 6 . ▁ ▁By ▁ 1 9 0 4 ▁time ▁signals ▁were ▁being ▁sent ▁to ▁ships ▁to ▁allow ▁navig ators ▁to ▁check ▁their ▁chron om eters . ▁ ▁The ▁U . S . ▁Navy