Awesome photos----okay, so I'm beginning to get the picture. A chaser attaches the downed logs to a cable or hook, correct? And then I'm just trying to figure out what a harder is exactly compared to a skidder
Chaser unhooks the logs, he gets to hang out next to the yarder and do all the grunt work like winding straw line and what not.
Yarder, I assume yers was just a typo, anyway yarder is basically a converted crane, bunch of winches and a steel tower, anywhere from 2-12 winches each one having a specific function. but that gets complicated and weird to explain
The basic premise of a yarder is to get the logs off the ground and drag them up hill to where they can be further processed, this area is called a landing, cause the logs land there get it. the tower on a yarder is a mobile replacement for the old trees that where climbed and topped before the mobile yarder was invented same idea just a bit safer and easier to set up. in a nutshell you have 3-8 guy lines these stabalize the tower and keep it from tipping over, each one on it own winch, then you have a main line, haulback, and skyline each of these holding from 1000 to 3000' of cable or sometimes more, then there might even be a strawline winch...
So the yarder is rigged up to a bunch of stumps and lift trees to keep it planted firmly on the landing, then the strawline is ran out through the unit to create a new "road" (logger term for where the logs are going to get drug through), the strawline is then used to pull the skyline or mainline (each crew and yarder seems to have their own term for these) this line being 5/8 to 1-3/8 in diameter weighing roughly .7 to 1.25 pounds per foot, whereas the strawline is usually 5/16-3/8 and cut up into sections to make it easy to drag around by hand in the bush, once the sky/main line is drug out to its respected tail hold, be it a stump or a tail tree depending on how much lift they need to yard the logs, then the rest of the rigging can be sent down on the sky line etc... any way its all rather complex when you type it out like this....
Once all the rigging is set up, and there will be miles of it... and each type has its own name and sub name and slang name... books have been written on this topic... and fought over... anyway the rigging crew can then start yarding logs, the rigging crew is going to be in no particluar order:
rigging slinger, like a lead for the choker setters (choker is what we use to hook the logs, it a odd shaped piece of cast steel the holds a ferul on the end of a cable to create a snare)
Choker setter, usually 1-2 depending on the size of yarder and wood, these guys alone with the rigging slinger hook the chokers to the logs.
On any rigging crew these above kids have probably the most dangerous part of the yarding process, they spend all day down hill form logs they are sending up hill... remember **** breaks...
Chaser, as above unhooks the chokers and does other landing maintenance
Hook Tender, his job is to maintain the rigging and get the next road ready. involves climbing and sometimes topping lift trees and myrad of other difficult mind bending tasks...
Yarder Engineer, thid dude usually some old fart, runs the yarder, with consists of a forest of levers and pedals to control every winch.
All these fine folks are spread out over 80-160 acres
They have to comunicate somehow so they use either radios or more commonly a deal called a Talkie Tooter, which makes a bunch of cheery whistles that can be heard miles away and over noisy diesel engines, they use a completely made up form of morse code, each function on each winch is signaled with a series of long and short whistles. The important ones to remember are 1 long means all stop, 7 long someones hurt...
A skidder, either rubber tired or tracked is basically just a big ass tractor with a big ass winch or grapple that goes out and drags logs in.
The steepness of the terrain mostly decides on whether folks are going to be logging with skidders i.e. ground based or with yarders, Shovel logging or using excavators/log shovels is the inbetween they can work on steeper ground then skidders, as well as flat ground, but are limited buy how steep they can go where as a yarder isn't so good on flat ground, but can work on some scary steep dirt.