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
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
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