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?
Answer: The curse needs the blood of everybody who took a coin from the chest. All the other pirates have already contributed so, as the movie opens, the only blood needed is Will's, substituting for his father. During the finale of the movie, Jack takes a coin from the chest, adding himself to the curse, so his blood is now required as well as Will's.
Tailkinker ★
But I didn't see any blood on the coins, and none of the pirates cut themselves, even before Will became part of the mix.
Yes, the other pirates did cut themselves before Will came into it, off-screen. The lack of blood on the coins can simply be explained as most of it dripping to the bottom of the chest, it being washed away by storms blown into the cave, or by the fact that they didn't drop that much blood on it in the first place.
When they had Elizabeth they believed she was Bill Turner's daughter, but they all thought the curse had failed, none of them had cut themselves so it makes zero sense.
They had been collecting back the coins for years. During that time they repaid their own blood. All they needed was the last coin and the blood of Bill Turner to break the spell.
lionhead