“The supplies and ordnance for three US Marine Expeditionary forces are pre-positioned in the Port of Baltimore”
No, there isn’t.
Yes there is:
Three Ready Reserve Force (RRF) supply ships for the US Marines are stuck behind the fallen Key Bridge.
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11 ships are stuck inside the Port of Baltimore besides the Dali, officials say
From CNN's Matt Egan
Federal authorities now said there are 11 ships, in addition to the Dali cargo vessel, stuck inside the Port of Baltimore following the collapse of the Francis Scott Key Bridge.
The Transportation Department told CNN on Wednesday that it corrected the data to reflect an additional vessel stranded behind the fallen bridge
Officials now say that the following vessels are stranded at the port:
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Three bulk carriers
One vehicle carrier
Two general cargo ships
11 ships are stuck inside the Port of Baltimore besides the Dali, officials say
The 4 MARAD US MArine supply ships blocked in Baltinore port are listed as
Cape Washington
Cape Wrath
Antares
Denebola
https://www.maritime.dot.gov/sites/marad.dot.gov/files/2021-10/RRF%20Mooring.pdf