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Summary of significant accounting policies, Offshore Vessels and Loderos (Details)
 12 Months Ended
Dec. 31, 2023
Offshore vessels and "loderos [Abstract]  
Vessels time charter period 1 year
Minimum [Member]  
Offshore vessels and "loderos [Abstract]  
Vessels SPOT mode period 1 day
Maximum [Member]  
Offshore vessels and "loderos [Abstract]  
Vessels SPOT mode period 30 days