![The forward hatch for the helm of a self-propelled semi-submersible vessel is left open during a boarding by a U.S. Coast Guard Cutter Bertholf boarding team that interdicted 7.5. tons of cocaine The forward hatch for the helm of a self-propelled semi-submersible vessel is left open during a boarding by a U.S. Coast Guard Cutter Bertholf boarding team that interdicted 7.5. tons of cocaine](https://c8.alamy.com/comp/PE4TXA/the-forward-hatch-for-the-helm-of-a-self-propelled-semi-submersible-vessel-is-left-open-during-a-boarding-by-a-us-coast-guard-cutter-bertholf-boarding-team-that-interdicted-75-tons-of-cocaine-from-the-vessel-in-the-eastern-pacific-ocean-aug-31-2015-the-seized-contraband-is-worth-an-estimated-227-million-us-coast-guard-photo-PE4TXA.jpg)
The forward hatch for the helm of a self-propelled semi-submersible vessel is left open during a boarding by a U.S. Coast Guard Cutter Bertholf boarding team that interdicted 7.5. tons of cocaine
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Weight reduction and strengthening of marine hatch covers by using composite materials - ScienceDirect
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Hatch covers of the container vessel loaded with containers and flat track with lashing material moored in port terminal and waiting for cargo operation Stock Photo - Alamy
![Hatch covers of the container vessel partly loaded with containers. Ship is moored alongside the port terminal in Ningbo China equipped with crane and lorries Stock Photo - Alamy Hatch covers of the container vessel partly loaded with containers. Ship is moored alongside the port terminal in Ningbo China equipped with crane and lorries Stock Photo - Alamy](https://c8.alamy.com/comp/S3JCMN/hatch-covers-of-the-container-vessel-partly-loaded-with-containers-ship-is-moored-alongside-the-port-terminal-in-ningbo-china-equipped-with-crane-and-lorries-S3JCMN.jpg)