Prior Information Notice - U-864 Keel access and mercury canister retrieval

a limited section of the keel of one or both wreck parts in order to retrieve mercury canisters and assess their condition, as well as evaluate the condition of the keel boxes along as much of the wreck's length as possible. There is also a need to map the depth to bedrock in the area immediate vici

nity of the wreck parts. The operation will require expertise in environmental monitoring and in excavation/dredging and/or drilling in contaminated sediments at water depths corresponding to the site (140-160 metres). Alternative approach