| | Forum | Last Post | Threads | Posts |
 |  | Discuss boat design concepts, projects, plans, reviews, resources, and general design topics. | |
Today 12:08 PM  | 9,972 | 139,246 |
| | Technical discussion on fluid dynamics: theory and analysis. | |
Today 10:56 AM | 271 | 7,220 |
| | Discuss stability issues and calculations, power and sail. | |
05-19-2013 02:23 PM | 547 | 10,237 |
| | Scantling Rules, updates and discussion on Society Classification: Lloyds, ABS, DNV, ISO ... | |
05-14-2013 05:01 AM | 240 | 2,662 |
| | Discuss production and custom powerboats and powerboat design. | |
Today 11:43 AM | 2,112 | 21,821 |
| | Discuss marine engines, drives, and propulsion systems. Sub-Forums:  Props, Surface Drives, Jet Drives, Outboards, Sterndrives, Pod Drives, Inboards, Diesel Engines, Gas Engines, Hybrid, DIY Marinizing | |
Today 01:54 PM | 4,255 | 48,852 |
| | Discuss monohull and multihull motorsailers and motorsailer design. | |
05-15-2013 11:51 AM | 111 | 3,070 |
| | Discuss monohull sailboats - production and custom - and sailboat design. | |
Today 12:13 PM | 3,266 | 57,698 |
| | Discuss multi-hull sailboats, catamarans and trimarans, and sailing multihull design. | |
Today 02:08 PM | 1,868 | 42,402 |
| | Discuss onboard mechanical, hydraulic, and electric control systems, monitoring, navigation, communication, systems integration and onboard computer systems. | |
Yesterday 09:17 AM | 493 | 6,861 |
| | Discuss marine design software: hull design, fairing, modeling, rendering, and CNC. | |
Today 11:55 AM | 2,215 | 18,409 |
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