Since no one is manning the ticket booth, you have to win your tickets (rowboat and submarine) playing darts in the Pub. The first time you visit the island, you get a camera for helping a driver. Then at the Pub, you get matches and a rowboat ticket -- the rowboat operator leads you to photo site that fails to provide clear evidence.
The second time you go to Loch Ness, you win the submarine ticket and photograph another false Nessie. But when you go back to the pub with it, you get a Pennywhistle that lets you summon the real Nessie when you venture out alone in the rowboat.
There does not seem to be a horn on Cryptids Island. There is a flute (a pennywhistle) which you receive after the submarine ride, after you defeat the sore loser at darts again.
first you have to ride the boat then go to the pub then you ask the guy in the blue then you will get it.
The pipe is a "pennywhistle." You get it when you beat the first darts player the second time, after you have taken the submarine ride and brought your photo back to the pub.
If you use the sub, I think you will find/see? Nessie.
You get the submarine ticket from the other two players in the pub, by winning at darts. Take the picture from the submarine back to the pub, where you find it is part of a movie prop. But the first dart player angrily returns and wants a rematch. Beat him to get the pennywhistle (from the bartender, not the sore loser).
You take the submarine ride on your second visit to Loch Ness. On your first, you get the camera, matches, and a ticket for the Rowboat ride, on which you take a picture of humps in the water. Since this is inconclusive, you return to Loch Ness and take the submarine tour (also using a ticket from the Pub), and finally a second solo trip in the rowboat.
Take the photo of the "loops in the water" back to Mews.
Beat the first player (wearing glasses) and take the rowboat ride, and bring the photo back to Mews. Return to play the other two players to win a submarine ticket (with better darts).
For some reason, the submarine ride will not shoot a photo right away. It may have had a "prompt" to help you at this point, and it runs without showing on the screen.
You win at darts a second time and get a submarine ticket.
The Pub is to the right of the loch at Loch Ness. You will play darts there to win the tickets to the rowboat and submarine.
When you have the submarine ticket, click on the sub (enter) and he will ask for your ticket.