Fair Winds and Following Seas - S10-E22
Continuity mistake: The opening scene, which is a replay of the ending scene from the previous episode, is slightly different. When Gen. Cresswell tells Mac she'll be stationed in San Diego, Harm comments "It's only a five hour plane ride" instead of "it's only five hours away", and when Rabb is promoted to Captain, Cresswell briefly pauses at "it's" when he says "By the way, it's a captain's billet", while there was previously no pause.
Fair Winds and Following Seas - S10-E22
Character mistake: Characters occasionally refer to Rabb as "Commander", even though they know he was promoted to Captain.
Chosen answer: When landing on an aircraft carrier, a pilot "calls the ball" by confirming to the landing signal officer (LSO) that they have the carrier, and more specifically its landing guidance systems in sight. Carriers use a Fresnel lens system which is a light only visible at a certain angle, so if a pilot sees the "ball" they are at the correct altitude and glide slope for landing.
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