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Wikipedia definition
1. Coastal artilleryCoastal artillery is the branch of armed forces concerned with operating anti-ship artillery or fixed gun batteries in coastal fortifications. It was long held as a general rule of thumb, that one shore-based gun equalled three naval guns of the same caliber, due to the steadiness of the coastal gun which allowed for significantly higher accuracy than their sea-mounted counterparts. Land-based guns also benefited in most cases from the additional protection of walls or earth mounds.
Read “Coastal artillery” on English Wikipedia
Read “要塞砲” on Japanese Wikipedia
Read “Coastal artillery” on DBpedia

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