Could attackers bypass a coastal battery by landing elsewhere?

Could an enemy land away from the heavy coastal guns and approach them overland?

The proposal uses the range, elevation and traverse of fifteen-inch guns to fire on other landing areas and concentrations of troops.

Landing beyond the obvious battery raises the problem of an attack from inland. The proposed response uses fifteen-inch guns capable of elevating to about 45 degrees and turning toward other landing areas. Their range would allow shells to fall onto troop concentrations without requiring armour penetration. The proposal belongs to the hypothetical island defence and does not identify a particular historical mounting.