Which exits are primarily used during a ditching evacuation?

During a ditching evacuation, the primary exit points utilized are the forward doors, specifically L1 and R1. The rationale behind this is that in the event of a water landing, these doors provide the most immediate and direct access to safety and evacuation. Forward exits are typically positioned where water might not be as deep compared to other parts of the aircraft, allowing for a safer egress for passengers and crew.

The option that mentions overwing exits only may not be appropriate in this scenario, as overwing exits are primarily designed for use in emergency evacuations on land or tarmac and may not be reliably accessible during a ditching, depending on the water conditions.

Emergency exits in the rear of the aircraft are also less ideal during a ditching since they may be submerged or compromised, posing additional risks to evacuating passengers. Lastly, while all doors including service doors might seem like a viable choice, service doors are typically not designed for emergency evacuations and may hinder an efficient evacuation process. Thus, the best and safest exits during a ditching situation would be the forward doors.