Stability and Consulting to 150'
- Stability Studies
- Rig and Spar Design
- Stabilizer Systems
- Powering and Systems
- Structural Modifications
Consulting takes many forms, it may involve getting my opinion on a particular boat or project or it may include planning or concept sketches and design drawings of a required modification.My work in consulting involves studies of powering, stability, control, motion, construction and arrangements. Small craft are generally anything under about 150' in length. Most of my current work concerns boats 24m and under. I work closely with associated experts including my colleagues in B.C. at CR Engineering.
2016/03/ Current Stability Projects as of March 2016:
- Bellacra Explorer Stability Study
Fast aluminum craft, stability study following successful completion of my recommendations for structural modifications to improve performance
- Majestic Warrior Stability Study Commercial Fish Packer
- Northern Dream Stability Study and Design Modifications for Pilot House 120' Motoryacht
- IV Interceptor Stability Study 36' Commercial Troller
- Leeway Stability Study 40' Schooner
- T1 Stability Study 100' by 25' Landing Craft
- Content Stability Study 60' Motoryacht
Introduction: Transport Canada Stability Booklets, ORC Stability Letters, Building to ISO Stability Standards
Preparing the Stability Booklet
Every vessel carrying passengers for hire in Canada must meet Transport Canada requirements for Passenger Vessels. Requirements include some form of stability study which may include the preparing of a stability booklet. These vary depending on the vessel size, voyage class, number of passengers carried, and experience of the master and crew. In many cases older vessels are brought into passenger carrying with little or no documentation. I am often requested to facilitate and research these vessels, and prepare the necessary documents. This may involve a simple roll timing experiment, coupled with a 3D computer model to arrive at basic stability characteristics for any vessel. Or it may require extensive measurements of a hull, creation of computer models, and damaged stability studies prior to developing a complete stability booklet as required by TC. Canadian vessels carrying more than 12 passengers will require a damaged stability study and this involves establishing watertight bulkheads to control flooded trim and stability.
Stability Booklet Testimonials
Just to say thanks again for your help. Without your expertise and support there is no way we would have got this done so quick. We can recommend anyone who has to get an existing or new vessel through the certification process to secure your services, as they are money well spent and result in big savings and hassles in the long run.
Kind Regards, Joanne and John Van Strien
Sail Training Vessel, Western Grace
Thanks for your great service on this project. David e-mailed me and the boat perfomed perfectly.
Eric Duncan, Lifetimer Boats
Tad On Understanding Stability Studies
Right, there is no point worrying about this, the boat is built. But knowledge is power and the more you know about your boat the better your decisions can be......Thus your plans for a rooftop hot-tub may require reconsideration.... This is one of my main points in this exercise, real world is different than theoretical, and it shows the folly of taking seriously stability curves based on published numbers. The good part is that an increase in displacement increases stability....... Stability Study for a Bolger Windermere
Stability model prepared for an Ocean Racing Stability Letter
Learn More About Our Stability Studies
Case Study for Ocean Racing Stability Letter
Case Study for Small Passenger, Commercial Fishing, Sail Training Vessel Stability Booklets
Case Study for Building to Complying with TC and ISO Stability Standards
Some Of My Blog, Forum Posts, And Seminars On Stability
Fritzi Ann and the Stability of Fishboats, blog.tadroberts.ca
The Typical Powerboat is Not Seaworthy, blog.tadroberts.ca
On Troller Stability, boatdesign.net
Vessel Stability: Myths and Reality, All-day Seminar, 2011