kpnuts
I would appreciate some info on loading supplies
If you are familiar with the ship arrange ment drawings (aka draughts) those will show pendants and/or tackles on the forestay(s) plumbed over the main hatches.
Those are combined with a burton pendant (typically a guntackle--a single & double block pair, not takle taken from a gun) from the end of the mai and fore yards.
Those yards are heaved around to get their ends over the supplying boat (lighter or hoy)
The yardarm tackles are bent together at the hauling (working) end, and also to the tackle over the hold hatch desired. This union is probably going to be a iron ring, but, it might be a hook.
The load to be hoist aboard (which could be from a tunne--a 168 gallon coopered cask; to a barre, butte, cask or the like) gets a (rope) sling passed around it. The sling is bent to the hook or ring from the yardarm tackles.
The yard arm tackles are heaved in first. Those lines will form a "V" to the load in the lighter. Heaving them in lifts the load stright up out of the lighter.
When clear of the rail of the reciving ship, the stay tackle is heaved in, which pulls the load towards the centerline of the recieving ship as the yard arm tackles are paid out (very slowly). Eventually, the stay tackle is bearing the weight, and it can be lowered away into the hold of the recicing ship.
The load is removed, and the tackles backed until the ring is back over the hoy, to repeat the process.
We still use this technique today, if with cargo booms instead of yards.
If you are using ship's boats, mostly likely the cargo is fresh water, hauled in with 68 gallon barrels and 54 gallon buttes (the kind of thing you could muscle ashore and fill from a stream). Larger cooperage--hogsheads and tunnes would be brought by lighter or hoy, as those vessles have room to bring a full load and not have to save room for rowers and the like.