Subclass V - Naval science (General).

Subclass VA - Navies: Organization, distribution, naval situation.

Subclass VB - Naval administration.

Subclass VC - Naval maintenance.

Subclass VD - Navel seamen.

Subclass VE - Marines.

Subclass VF - Naval ordnance.

Subclass VG - Minor services of navies.

Subclass VK - Navigation. Merchant marine.

Subclass VM - Naval architecture. Shipbuilding. Marine engineering.

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