The sheet issued by Libya in 1992 as given on the sheet, Stanley Gibbons give 1993 depicts the following ships, the details you can find in the index.
Sg 2140 Roman merchant.
Sg 2141 Byzantine dromon.
Sg 2142 Punt.
Sg 2143 Phoenician bireme.
Sg 2144 Caravel.
Sg 2145/2146/2194/2150. The stamps shows a small I believe wooden fishing vessel, it is the same ship in various positions on the stamps, on which on one clearly is visible the Italian flag.
Sg 2147 Mediterranean galeasse.
Sg 2148 Nau.
Sg 2151 SANTA MARIA (Columbus flagship)
Sg 2152 FRANCE
Sg 2153 Topsail schooner.
Sg 2154 AMERIGO VESPUCCI, Italian training vessel.
Sg 2155 GARNATA or TOLETELA