Areas of Expertise:

• Marine/boating accident investigation and reconstruction; vessel collision analysis; assessment of liability/culpability.
• Interpretation of Inland and International Rules of the Road; operation of vessels; proper boat handling and seamanship; navigation and piloting; vessel traffic management; lake and waterways management; regulatory markers and aids to navigation.
• Marine surveys; marine propulsion; marine mechanical and electrical systems.
• Recreational boating safety enforcement & education; operational law.
• Expert witness & litigation support, criminal and civil (evaluation of evidence, examination of experts & depositions, prepare exhibits & expert report, testify).

Capt. Mark S. Poster

Phone 909-725-0447; Fax 909-584-8899
Email: boatcrashexpert@hotmail.com
PO Box 129
Big Bear Lake, CA 92315

Capt. Joseph A. Derie, D.Sc, PE

Phone 503-236-6818; Fax 503-961-1128
Email: joederie@earthlink.net
1205 SE 57th Ave
Portland, OR 97215