Large cargo ships move 50 average trainloads of cargo. Saying you can replace cargo ships with trains is like saying you can replace a freight train with a fleet of semi trucks.
You can replace each with the other, if necessary and the situation allows. The western allies for instance famously replaced the shattered French railroad system with the “Red Ball Express”. .
The problem gets complicated by circumstances, like loading and unloading ships.
Euro aid normally goes by rail or road all the way. US aid goes to Dutch, German or Polish ports. Sometimes for high value or urgent stuff by air to Poland, and, I understand, sometimes direct to Ukraine. Ukraine does have working airfields.
“Large cargo ships move 50 average trainloads of cargo. Saying you can replace cargo ships with trains is like saying you can replace a freight train with a fleet of semi trucks.”
Thanks, and very true. That occurred to me after our ‘discussion’ (LOL). I suspect that the tracks, and trains, in Poland are quite busy even without having to add all of the munitions and other equipment meant for transport on the ‘grain vessels’ (LOL).