Details of the journeys that travellers make to and from Jersey could be kept for up to 10 years as part of a UK-wide system to tighten border controls.
The island's customs department said Jersey had agreed, in principle, to join the e-Borders programme.
It means that when someone books a flight or ferry their details would be checked on the UK e-Borders database.
The system, which started in the UK in 2004, aims to protect against terrorism and illegal immigration.
Steven le Marquand, from Jersey Customs Department, said the island "still had to consider the full impact" of signing up and nothing had been decided yet.
He and customs representatives from Guernsey and the Isle of Man are due to attend a meeting with the UK Border Agency tomorrow, where implementing E-borders in the islands will be discussed.
A spokesman for the UK Border Agency said at the moment they were checking about 60% of travellers into the UK.
By March 2014, he said, they aimed to be running the details of 100% of travellers into and out of the UK through the database.
It means that at some point over the next few years fishermen and yachtsmen will be required to register details of forthcoming journeys with the agency online.
But Mr le Marquand, who said he had been "inundated" with phone calls from worried sailors, said the issue of registering sailing trips in Jersey had not yet been discussed.