What defines the duration of risk for loans?

The duration of risk for loans in the context of maritime commerce is primarily defined as the period from departure from port until the arrival at the destination. This is because the risk associated with the loan often hinges on the cargo being transported. During transit, the cargo is at risk for various factors such as theft, damage, or loss due to maritime perils.

Once the cargo leaves the port of origin, the loan is effectively under risk until it safely reaches its intended destination. The shipping process involves multiple threats that can affect the cargo, thus determining the risk period based on the shipment's journey is crucial for understanding the loan's exposure.

The other options do not accurately represent the maritime commerce scenario. The time frame from loan approval to delivery does not account for the actual transportation risks post-approval. Focusing exclusively on loading and unloading neglects the critical transit phase where most risks occur. Lastly, considering the entire period from signing the loan to repayment does not capture the specific maritime risk exposure associated with the transportation of goods.