The Department should state that trims should never exceed certain limits, or alternatively and preferably, hydrostatic data for large trims should be included in the Stability Booklet, but noted as being for harbour guidance only. Furthermore, the Stability Book should emphasise the need to keep a running check upon metacentric height at the relevant trims during the unloading/loading operations. The Stability Book or Approved Program must apply to all operating conditions, not only to seagoing conditions.