Ok, there's a "torpedo looking" thing with a wing on it, that's a paravane.
It's used to haul the sweep wire out along side of the ship. The shape and wing dive it some "lift" so it can 'parallel' the vessel when towed at the right speed.
An otter is the pallet-looking thing on the sprue. it's designed to pull the ship's end of the sweep wire down to the desired depth.
The sweep wire runs out from the ship and to the paravane. There's a cutter blade on the paravane so that, when the floating mine's cable is collected in the sweep wire, the cutter nips the nooring wire, so the mine then floats to the surface. It is then engaged with gunfire to hole the case, and cause the mine to sink.
The big reels on the stern of the sweep carry various wires to be streamed over the side for this. Which gets technical, quickly (and faster than I can find an online reference right now). If you can find them, WWII and KW-era BM/1&C manuals often have a great deal of detail on the "bits" involved. A Knight's Nodern Seamanship from that era will too (if over-oriented towards CL & CLAA deployement).
One thing the Lindberg kit does not have are the spar-bouys used to mark channels. But, that's not great loss.
Now, if it's after WWI, a bunch of the sweep gear is painted Red or Insignia orange or the like. Paravanes are "handed" too (not that you can tell on the kit). The port one will have either float or wing painted red, the starboard one in green.
Now, if i could just find the right tome, I could tell you whether it's diamond-ball-diamond or ball-daimond-ball is the hoist for sweep operations--which is a cool detail to have by the flag bags.
maybe that helped, maybe not.