Why is it der Tanker?

Tanker ends in -er, and most nouns ending in -er are masculine: in a German dictionary, 86% of them take der.

All nouns ending in -er
Sense 1
der

Meaning

[1] Ship that is intended for the transport of liquid or gaseous goods

[1] Schiff, das für den Transport flüssiger oder gasförmiger Güter bestimmt ist

Examples

[1] In Wilhelmshaven, a lot of oil is fed by tanker

[1] In Wilhelmshaven wird viel Öl durch Tanker angelandet.

[1] "With his tankers, he was one of the world market leaders and his family in the league of the Reichstä" "

[1] „Mit seinen Tankern gehörte er lange zu den Weltmarktführern und seine Familie in die Liga der Reichsten.“
More source examples (1)

These dictionary examples can include historical and less common uses.

[1] "The tanker flew into the air at the first goal"

[1] „Bereits beim ersten Treffer flog der Tanker in die Luft.“

Declension

1 Singular Plural
Nominativ der Tanker die Tanker
Genitiv des Tankers der Tanker
Dativ dem Tanker den Tankern
Akkusativ den Tanker die Tanker

Pronunciation

In context

Dictionary entries include material from Wiktionary. Wiktionary