Venezuela swaps oil with Cuba for medical staff (doctors and nurses). The oil is refined in Havana and used in the country and a small amount exported for cash. That is Cuba's biggest income into the country followed by the tourist dollar.
Tankers waiting for fuel. I believe they are used to transport fuel around the coast of Cuba.

View across the harbour.
Tankers waiting for fuel. I believe they are used to transport fuel around the coast of Cuba.

View across the harbour.
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