Revenue per available lower berth day is a measure of revenue for cruise ships, and is very similar to hotel revpar. Like revpar, it measures the revenue generated per unit of available accommodation.
Like revpar, revenue per available lower berth day can be broken down into pricing and occupancy components. Similarly, trends are more important than absolute rates.
Revenue per available lower berth day is sometimes stated net of travel agents' commissions and air transport costs. This is sometimes called net revenue yield.