Hiccup: "We are sending out our fastest ships to find new dragon training recruits, but the fog is too thick for them to travel. People who live in normal places can wait for the fog to lift ... but this is Berk. It's always foggy and cold. You and I need to put our heads together and find a solution to this right away! Start by talking to Mulch. He is our best fisherman and grew up around boats. He can tell you more about the problem."
1- Meet Mulch by the school lake
Mulch: "Fishers depend on the position of the sun and the stars to find out where we are and how to get to our destination. When the sun is gone, we're more confused than blindfolded Gronckles! If we want to sail through thick fog, we need to know where the sun is at all times."
Hiccup: "Now that Mulch mentions it, I've heard of Vikings using a sunstone compass to help navigate deep fog. Let's try and make one. One of the main parts of the sunstone is an Iceland Spar, a rare transparent calcite crystal. There's not many of them around, but I think there's one in a cave in the Wilderness. You should go find it."
2- Find the Iceland Spar in the Wilderness
Hiccup: "What a find, [Your Viking's Name]! That's going to fit perfectly in our device! The crystal can split light that shines through it along different axes. This is called depolarizing the light. The Headmaster taught me that! Now, bring that sunstone to me so I can shape it for our device."
3- Deliver the spar to Hiccup
Hiccup: "This rock is perfect for our compass! We need to gather all the other parts. We need to create a frame for the sunstone that we can rotate to find the sun. We can do that with two pieces of round, precut wood. Will you ask Bucket if he has any that could fit? He always seems to collect weird odds and ends!"
4- Get wood pieces from Bucket
Bucket: "How about these broken pieces off my old boat? I don't know if I can make something good out of it, so you can have them. You can use one for the top and one for the bottom."
Hiccup: "We need to get some metal to hold them together. I bet the blacksmith will have some to spare! Go see Gobber in Berk."
5- Talk to Gobber in Berk
Gobber: "Sure, I have plenty of nails you can have for your little project! I don't have any on me right now. I left some nails and metal parts on my front porch, or near my house, or somewhere around there. I'm not very tidy! Go to my house and pick up 3 of the nails."
6- Collect 3 pieces of metal from Gobber' house (0/3)
Gobber: "Those will do, [Your Viking's Name]. Those will do. You've got a good start, but wood and metal isn't enough to make the compass rotate. You'll need a couple of gears to help it move. Phlegma has spare gears, just in case her watering machine breaks. She might give one to you. Go talk to her at the Lookout!"
7- Meet Phlegma at the Lookout
Phlegma: "Nice to see you, [Your Viking's Name]. I'd be glad to give you a few gears, but you can never get something for nothing. You'll need to do something for me! I'm making dinner for the Headmaster tonight and his favorite dish is halibut! Can you go down to the beach and catch me one while I look for the gears?"
8- Catch a halibut at the sea
Phlegma: "That looks mouthwateringly tasty! Please bring the halibut to me and I will give you the gears you were looking for."
9- Deliver the halibut to Phlegma
Phlegma: "Here you go! I'll make sure to let the Headmaster know who caught this delicious fish!"
Hiccup: "Great! Now that you have all the parts, we can put this sunstone compass together."
10- Deliver the parts to Hiccup
Hiccup: "I'm really excited that it's finished! Let me tell you how this works. You place a do to the top of the crystal and then look up at it from below! The incoming light hits the dot and duplicates it. This optical effect, amazingly enough, is all we need to find the sun even through the thickest fog. That will help Vikings determine the correct course, even at sea! This will take a little while to put together. Why don't you take [Your Dragon's Name] into Flight Club and run a course or two?"
11- Play a Flight Club course
Hiccup: "It's a great feeling to fly through the sky on your dragon! The sunstone compass is done. Please come get it."
12- Collect the compass from Hiccup
Hiccup: "This has to be one of the coolest inventions ever! Please bring it to Mulch in Berk. I'm sure he'll be glad to have a solution to the fog."
13- Deliver the compass to Mulch
Mulch: "You and chief Hiccup are quite remarkable. I will get this on my fishing boat and have Bucket start spreading the word to everyone."