Coastal defence and fortification
[bg] Брегова отбрана
[es] Defensa costera y fortificación
[et] Rannikukaitse
[fi] Rannikkopuolustus
[la] Castellum maritimum
[mr] जलदुर्ग
[ms] Pertahanan dan perkubuan pantai
[nl] Kustfortificatie
[nn] Kystfort
[nb] Kystfort