I think the straightest Way is to implement an Idea of connected Water-Area and let the Player select which Water gets next Ships. If he don't select to send to Ponds it never happened (but he can if he want if he think a Pond to be large enough for his Needs).
I think the straightest Way is to implement an Idea of connected Water-Area and let the Player select which Water gets next Ships. If he don't select to send to Ponds it never happened (but he can if he want if he think a Pond to be large enough for his Needs).