if the swiss can have a merchant marine & patrol boats (and hence the ability to also interact with pirates), so can the afghans, lets not be so elitist, if they want a navy why not.....
Swiss Naval Site
i hereby present this list of the worlds top ten small navies:
1. The Pontifical Vatican Navy
2. Royal Bhutanese Navy
3. Peoples Navy of Mongolia
4. Royal Lesotho Navy
5. Andorran Navy
6. Royal Jordanian Navy
7. Afghan Navy
8. San Marino Navy
9. Royal Liecheistien Navy
of course one reason to have a navy is to defend against pirates :P