At this point, we expect that there will be two bunkering points, probably one in the Oslofjord and one in Rogaland/Stavanger area. As a minimum, the vessel should be able to carry fuel for a one-way trip plus extra for safety. For your project offer in this phase, you may take this as a starting point. However, if your concept manages one bunkering per round trip, this will probably be beneficial for the total solution. The RfI, appendix A ch. 6.2 indicates bunker capacity of minimum 500 nautical miles, including port operation in normal operation and weather conditions.
Ideally, bunkering is done in a port while loading or unloading, to avoid deviation and increased time in port. This is, however, not required in the "Request for Interest" for fuel supply and infrastructure. If the total cost of power is lower for bunkering in other areas, this will be preferred. Fuel suppliers are free to propose one or more bunkering points in the trading range. Multiple bunkering points will reduce the need for onboard storage and is therefore preferred if the impact on the fuel price is minor.