Visible crew/equipment: Just as Jack says, "On deck, you scabrous dogs," to the very left edge of the screen over Jack's shoulder is a grip crew member with a tan cowboy hat, white short sleeve tee shirt and sunglasses, just standing there looking out to sea. (02:12:35)
Jack Sparrow: Who makes all these?
Will Turner: I do. And I practice with them... Three hours a day.
Jack Sparrow: You need to get yourself a girl, mate. Or perhaps the reason you practice three hours a day is that you've already found one and are otherwise incapable of wooing said strumpet. You're not a eunuch, are you?
Visible crew/equipment: Jack is in one of the boats with Norrington and his men, at Isla de Muerta. Norrington looks through the telescope, saying that he doesn't care for the situation and in the wide shot, when Jack says, "Not if you're the one doing the ambushing," in the water, to the right of the boat, a crew member's green flipper can be seen coming up out of the water. The divers kept the boats steady while filming. (01:43:05)
Jack Sparrow: Alright then. I confess. It is my intention to commandeer one of these ships, pick up a crew in Tortuga, raid, pillage, plunder and otherwise pilfer my weasley black guts out.
Mullroy: I said no lies!
Murtogg: I think he's telling the truth...
Mullroy: If he were telling the truth, he wouldn't have told us.
Jack Sparrow: Unless, of course, he knew you wouldn't believe the truth, even if he told it to you.
Jack Sparrow: No! Not good! Stop! Not Good! What are you doing? You've burned the food, the shade. The rum.
Elizabeth Swann: Yes, the rum is gone.
Jack Sparrow: Why is the rum gone?
Elizabeth Swann: One, because it's a vile drink that turns even the most respectable men into complete scoundrels. Two, that signal is over 1,000 feet high. The entire Royal Navy is out looking for me. Do you really think there is even the slightest chance they won't see it?
Jack Sparrow: But why is the rum gone?
Chosen answer: Because they'd have to find it. The gold may "call to them", but it obviously doesn't function as a millimetre perfect homing beacon or they'd never have missed the medallion years earlier when they attacked the ship carrying the young Will. Elizabeth drops it into the sea and they're going to have to spend what could be months trying to locate it - currents could take it well away from the dropping point. They've found the final missing piece; they're potentially just hours away from finally being cured. The last thing they want is to see it thrown into the sea.
Tailkinker ★
Well, if the crew was anxious to get the medallion then why did they act like they weren't interested in it before Elizabeth pretended to drop it?
Reverse psychology.
Ssiscool ★
What do you mean by reverse psychology?
By showing they are not interested in the medallion they are hoping Elizabeth will just drop it on the floor or chuck it to them as it's of no real value. However when she releases a bit of chain and the medallion drops, and the pirates lurch forward revealing that they really want the medallion and as such Elizabeth now has the upper hand in negotiations.
Ssiscool ★
I'm guessing Elizabeth wasn't fooled when the pirates showed disinterest in the medallion.
That's not called reverse psychology, which is used to encourage someone to change his or her mind. Doesn't work with a threat. They are feigning indifference to hide the importance of the object.
lionhead
They didn't want to give her an advantage over them. Pretending to not care about the coin would make Elizabeth think that the coin is worthless and cannot use it to barter a deal.