Specifications include, but are not limited to: Texas Parks & Wildlife Department (TPWD) Artificial Reef Program (ARP) is soliciting multi-day, live-aboard dive vessel services (time and operational personnel) to transport TPWD scientific divers and volunteers offshore to designated artificial reef sites and other dive locations for maintenance and monitoring activities as needed. Reef sites may be in the North Zone (north of Port O’Connor) or South Zone (south of Port O’Connor). Potential bidders have the option to bid on all zones or only one zone. Scientific diving may require the use of advanced techniques such as double air tanks. Also, biological monitoring techniques performed on-board will involve vertical longlines (fishing lines with reels), remote operated vehicles, datasondes, and other similar work