- 1. Good Weather Performance Speed
- There are two kinds of “performance speeds” assessed by weather routing companies. One is the Good Weather Performance Speed, analyzed based on the good weather analysis methodology, and the other is the Entire Voyage Performance Speed, which applies a weather factor.>>> Read the extract.
- 2. Good Weather Analysis Method
- A Good Weather Analysis is the correct methodology for speed & bunker analysis calculations as set out in two English Law precedents, namely: LMLN 357 (1993) B.P. Shipping Ltd. v. Exmar N.V. (The Gas Enterprise) - Court of Appeal (Lloyd, Butler-Sloss and Roch L.JJ.), and The Didymi [1988] 2 Lloyd’s Rep 108. This methodology is widely accepted in London legal circles.>>> Read the extract.
- 3. Good Weather Analysis with “No Adverse Current”
- If the good weather definition has a “no adverse current” stipulation in the Charter Party, currents should be taken into account in selecting good weather days, as demonstrated in London Maritime Arbitration award LMLN 723 (2007).>>> Read the extract.
- 4. Good Weather Definition missing parameters
- For days to be selected as ‘Good Weather Days’, they must meet all parameters defined in the charter party. The definition of what constitutes ‘good weather’ (the conditions under which the definition of the vessel's speed and consumption warranties are valid) varies widely from Charter Party to Charter Party. >>> Read the extract.
- 5. Current Factor
- The current factor is a numerical representation of the influence of all currents encountered by the vessel en route. Ocean current data is analyzed at all points along the vessel's route to determine how much effect each current has on the vessel at any given time.>>> Read the extract.
- 6. Time Lost and Over-consumption Calculation
- Time lost and over-consumption calculation methodology explained in the “DIDYMI” case and the “GAS ENTERPRISE” case is to separate out the periods when the vessel is sailing in good weather conditions and calculate from that the vessel's good weather speed / consumption.>>> Read the extract.
- 7. “About”
- Nowadays almost all Charter Party apply "about" on speed and consumption with the word “about” before speed and consumption values, and / or a phrase “All details ‘about’” in the vessel's particulars section.>>> Read the extract.
- 8. Weather Factor and Entire Voyage Performance Speed
- The vessel's Entire Voyage Performance Speed is another Performance Speed utilized in weather routing operations, but it is not preferred in arbitration circles.>>> Read the extract.
