The numbers 312 are a code at Bouffant Bay. The pirate says that he heard that the map piece is at "312 Hanging Fern Lane", a fictitious address. This is a reference to the three ferns in hanging baskets at the house on the far right. Jump onto or into the baskets in that order : the 3rd (right), the 1st (left) and the 2nd (middle). The map piece will fall from the middle fern.
The clue is 312 Hanging Fern, and it is not an address. There are 3 hanging ferns (in flower pots) in front of the house at far right. Jump up and hit them in order: 3rd, then 1st, then 2nd, to reveal the map piece.
Yes, there are several people in the Skullduggery Island on Poptropica. On of which is a deck hand. you can find him on the top left island.
The combo is 312.
You don't jump on the plants the sequence 312 so you actually jump up and hit the plants in this order 312 and the part of the map will come down
The treasure is on a secret island which is revealed after you find all pieces of the map, called Skullduggery. But I don't know how to get it yet.
find broken boats and then sell them
I wish i knew. hmm
There is nothing to be found on the hidden island (Skullduggery) until after you beat Captain Crawfish. After you defeat Captain Crawfish, the governor gives you a treasure location and a bone shovel. Sail to the hidden island. You will find the treasure under a mound, six paces right from the pirate flag.
It is not an address. It refers to the three hanging ferns at the residence to the far right at Bouffant Bay. To get the map piece, jump into the ferns in that order : 3rd, then 1st, then 2nd. The map piece will fall out.
You find the navigator in the second floor of the bar at parrot port.
fix the lights on another island
Hit the ferns in order at Bouffant Bay : the 3rd (right), 1st (left), then 2nd (middle). The clue from the pirate was "312 Hanging Fern Way".