Red Tree Lumps will be the biggest bottleneck. Start pre-ordering on CM and get your workers working. The worker nodes for Red Tree Lumps are: - Quint Hill (North-west of Calpheon, between Quint and Troll) - Old Dandelion (North-east of Calpheon, below Khuruto) - Northern Plain of Serendia (West of Heidel, at Dastard Bheg) As for the materials, you will need: +10 Epheria: Old Prow +10 Epheria: Old Plating +10 Epheria: Old Cannon +10 Epheria: Old Sail (Base versions can be purchased from Philaberto Falasi in Port Epheria.) Island Tree Coated Plywood x100 (Barter) Rock Salt Ingot x100 (Barter) Deep Sea Memory Filled Glue x4 (OE Daily quest) Seaweed Stalk x6 (OE Daily quest) Graphite Ingot for Upgrade x100 (10,000 Zinc Ingot + 100 Sea Monster's Ooze) Timber for Upgrade x100 (10,000 Old Tree Bark + 10,000 Red Tree Lumps + 100 Sea Monster's Ooze) Adhesive for Upgrade x100 (10,000 White Cedar Sap + 10,000 Acacia Sap + 10,000 Elder Tree Sap + 100 Sea Monster's Ooze) There's a 7 day questline @ Crow's Nest which can give you half the materials needed for a Caravel. I strongly suggest doing that till at least day 5 as you will only need 5,000 Graphite, Timber, and Adhesive after this.

Hi, you can also visit the Wharf manager and select the option to upgrade your Epheria Sailboat to Caravel and he wil show you the materials you need.

Don't forget you can only upgrade your boat where you stored it.