Maritime transport, specifically Tramp Ship Scheduling, is very similar to a taxi operation. Taxi logistics are known in literature as Pickup and Delivery Probl

Maritime transport, specifically Tramp Ship Scheduling, is very similar to a taxi operation. Taxi logistics are known in literature as Pickup and Delivery Problems with Time Windows (PDPTW) -- which is an advanced type of VRPTW -- which, in turn, is more complex than the classic TSP. To answer your question: mathematically, Tramp Shipping is a more advanced type of PDPTW, so they are almost equivalent. We will support PDPTW on our API soon, but what I present here with Routific is but a subset of what I cover in my thesis: Multi-Depot Capacitated Vehicle Routing Problem with Time Windows and Heterogenous Fleet with Shift Constraints (MDCVRPTWHFS -- so glad I did not pursue academia) P.S.: in my thesis I also optimize the sailing speed of the ships, which -- as my thesis goes -- can save millions a year on top of an already optimized shipping fleet. The cubic relation between sailing speed and fuel consumption does not hold for vehicles on the road though.