How to Layout a Deck Camber - Traditional Boatbuilding Geometry

Howdy folks! Welcome back to Nomad Boat Building. My name is Mark Reuten, and in this episode, we step back into traditional boatbuilding geometry and lay out a deck camber using simple geometric methods. Instead of relying on some form of compass to lay out a chord of a circle I walk through a practical shop-friendly approach using basic tools to create an accurate crown over a given span. We talk about how deck camber is defined in boat plans, how to translate that into a physical layout, and why this geometric method is often faster and more practical than using a string-and-radius approach—especially in a small shop. This technique is useful not just for deck beams, but also for making reusable patterns, shaping beam shelves, and ensuring consistent curvature across the entire boat. My Website https://www.nomadboatbuilding.com Support the channel on Patreon https://www.patreon.com/nomadboatbuilding Follow along on Instagram @nomadboatbuilding Support the Channel If you enjoy these videos you can help the channel by: • Liking the video • Subscribing to the channel • Leaving a comment • Using Super Thanks Support these videos with monthly or annual pledges at Patreon: https://www.patreon.com/nomadboatbuilding Chapters 00:00 Introduction to deck camber geometry 00:11 What deck camber actually is 00:29 Reference: Chapelle’s Boat Building 01:12 Why traditional knowledge still matters 02:20 Why this method makes more sense over time 03:08 Defining camber (crown vs width) 03:49 Example: 3" crown over 5 ft 04:56 Laying out the baseline 05:44 Establishing perpendicular height 06:15 Creating the camber radius 06:30 Dividing the arc using geometry 07:30 Dividing the baseline 08:17 Connecting points to form the curve 09:56 Using awls to set reference points 10:53 Fairing the curve with a batten 11:48 Why not just use a string radius? 12:30 Making reusable camber patterns 13:09 Applying camber across the boat 13:41 Real-world compromises and fairness 14:05 Final thoughts on geometry in the shop #WoodenBoat #BoatBuildingGeometry #DeckCamber #Woodworking #TraditionalCraft #NomadBoatBuilding