Human
Flag
Company
Country
Corsica Ferries (Italia), S.r.l., Livorno
Italy
Lower Lakes Towing, Ltd.
Canada
Pocahontas Steamship Company United States
Princess Cruises Ltd., London

That's a silhouette of a "princess" with wavy blue and green hair.

UK
Minoan Lines Shipping S.A., Heraklion
Greece
Global Marine Systems UK
Hans Rinck Brennstoffe ("fuels") OHG
Germany
Argonaut Line United States
"Narraganset" (ship, 1841-1855) United States
Panalpina Switzerland
St Nicholas, patron saint of sailors Germany
Rheinischer St. Nikolaus Schifferverein e.V.
i.e. non-profit Rhenish St Nicholas Shippers’ Association
Germany
Powergen p|c, London

Prometheus giving fire to humans

UK
Unknown XXX
Sessanlinjen
Sweden
Tankerska Plovidba - Zadar

A haloed horseman riding to hoist holding a spear (St. Grisogon, patron of Zadar)

Croatia
Bergnings och Dykeri AB Neptun

white field, in center Neptune riding a black seahorse in rather Wagnerian atmosphere; in the canton the Swedish flag.

Sweden
Union Sulphur Co. United States
Larrinaga Steamship Co. Ltd, Liverpool.
UK
Larne & Stranraer Steamboat Co UK
Bibby Brothers and Co., Liverpool.
UK
Bibby Line Limited
Isle of Man