Abby tells McGee she thinks she heard Ducky curse but she is not that familiar with British profanity. It is wrongly assumed that only people from England are British. Although Ducky is Scottish all citizens of the United Kingdom and British Overseas Territories, and the Crown dependencies are considered British.
At around 5:10 Gibbs says the explosion source is a mark 24 torpedo. But at 15:06 Abby calls it a mark 46 torpedo.