The radio announcer is John Facenda, who for many years was the newscaster for CBS's WCAU radio and television in Philadelphia.
In this show he even gives the call letters, indicating that the castaways' radio must be very powerful indeed.
John Facenda the news reporter who's voice is heard on the radio was the Narrator of NFL Films Presents 1967-1984.
The title is based upon the call between two ships passing at sea before the advent of radio: "Ship Ahoy!" The reply would be the name of the ship, their last port of call and the number of days they had been traveling since their last port.
When The Professor leaves Ginger's hut at around the 14 minute mark, he tells her that Shakespeare said "Oh, what a tangled web we weave / when first we practice to deceive." Apparently his many degrees do not include English Lit, or he would be aware the quote come from Sir Walter Scott.
The announcer states in college football Army beat Navy 51-7. This episode aired in February 1966, after the 1965 season and before the 1966 season. In 1965 Army and Navy tied 7-7. Army beat Navy in 1966, but the score was 20-7.