Reels and spools are different. A reel has a handle that allows quick reeling in of line. They come in sizes, ranging from 100 feet or so to huge exploration reels. If you are running more than about 50 or 75 feet of line, it's absolutely maddening to hand-wind the line back onto a spool. At least in Mexico, many primary lines are more than 50 feet inside the cave, so a primary reel is a must.
Spools, which have to be wound manually, are used for short distances, like most jumps and gaps, and spools are also carried for emergency purposes, like executing lost line and lost diver searches. You really do need both.
AJ is spot on with the idea that you can buy a lot of this stuff used. I paid $115 for my primary reel -- It's a Halcyon that retails for a good deal more, but I bought it used and in perfect condition except for a single splice in the line.
Spools, which have to be wound manually, are used for short distances, like most jumps and gaps, and spools are also carried for emergency purposes, like executing lost line and lost diver searches. You really do need both.
AJ is spot on with the idea that you can buy a lot of this stuff used. I paid $115 for my primary reel -- It's a Halcyon that retails for a good deal more, but I bought it used and in perfect condition except for a single splice in the line.