Say you rolled 7 goods and you have "Quarrying".
You then have to move "Stone" twice.
Do you move it one extra hole each time (resulting in advancing 4 times the stone peg) or just once for the whole process ?
You get 3 units of stone in that case.
Say you have 4 stones and you have "Engineering". Can you convert all your 4 stones to 12 workers ? Or can you just do 1 stone for 3 workers once ?
You can turn in any # of stone to get 3 workers apiece
Can you build boats before the "shipping" developement ?
Yes. Nm, yeah, in order to build ships, you need to build the Shipping development first, so the answer is No.
You build ships during phase #3. Developments are in phase #5.
For every Wood plus Cloth combination your turn in during the Build Cities, Monuments, and/or Ships step, you may build 1 ship. (The Wood is used for the hull and the Cloth is used for the sail.) No workers are needed to build ships. Mark the ships you build on your score sheet. Every turn, for every ship you own, you may swap any one good for any other good during the Trade step. For example, if you owned 2 ships, you could swap 1 Stone and 1 Wood for 2 Spearheads. (All swaps made with Shipping are made with the bank, not the other players.)
1) based on computer implementations
2) based on IRL games I've played with others who (supposedly) know the game.