Poster-Derie Marine Consulting & Investigations

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: 208-721-4446
PO Box 4728
Ketchum, Idaho 83340

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

Phone: 503-236-6818
1222 SE 57th Ave
Portland, OR 97215

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