The Planning schedule is only available for vintrace Enterprise subscription. 

In the Schedule Details tab of the destination vessels in your work order, you have the option to swap the vessels while viewing the equipment schedule.

Click on the Schedule Details tab on your current transfer work order.

In the Schedule details tab, click on the equipment schedule for the vessel.

You can then select to view whichever schedule you require to make your decision. Click Use on the vessel you want to use as the new destination vessel in the job. 

In the Schedule details screen, the vessel will be updated to the tank you have selected. The destination vessel will also be updated on the General tab for your transfer work order.