The main purpose of border surveillance shall be to prevent unauthorised border crossings, to counter cross-border criminality and to take measures against persons who have crossed the border illegally.
Is é an príomhchuspóir atá leis an bhfaireachas ar na teorainneacha trasnú neamhúdaraithe a chosc, an choireacht trasteorann a chomhrac agus bearta a ghlacadh i gcoinne daoine atá tar éis an teorainn a thrasnú go neamhdhleathach.