He was saying that crossbows get 4-5 movement points, allowing them to traverse hills.
I mean this as if, say, your EMBARKED crossbowman has 5 movement, you use one of them to disembark and have 4 movement to use on your tiles. You could go up a forested hill and shoot. Sorry if I didn't state it correctly. I can confirm that all units, and not only melee, receive the "Only spend 1 movement to disembark.
Let me try to explain this better.
The UA: Viking Fury - Embarked units have +1 Movement and pay just 1 movement point to move from sea to land. Melee units pay no movement point cost to pillage.
Ok. Upon researching Optics, your units might embark. When embarked, they have 2
. If you are Denmark, they have 3
. This apply to all units. So, there are some techs (like Astronomy and Steam Power) that increase the embarked movement by 1
, so if we're talking about a post-Astronomy Crossbowman, it has 4
when embarked. I think you could enhance that with the Great Lighthouse, but I'm not 100% sure its bonuses apply to embarked units, so let's ignore it.
Embarked Crossbowman - 4
Now, we disembark the unit: because of the UA, we pay only 1
. So, our Crossbowman (let's say it was adjacent to a coastal tile) pays the movement and now has 3
to use wherever he disembarked into. With 3 movement, you can go up on a hill and still shoot. That's what I meant, it was quite confusing, I bet. Sorry
Also, I think the GL bonus applies to embarked units... and that Commerce or Exploration policy, I'm not , that gives +1 move/+1sight to naval units applies too, methinks. I'm not sure and will test this later. In the end, it can be really powerful! Assuming all the bonuses apply:
2
Optics + 1
Viking Fury + 1
Astronomy + 1
Steam Power + 1
GL +1
Policy = 7
by the industrial era. 5 if the GL and policy doesn't apply. Very powerful. Specially with N. Ski Infantry with double speed on hills. Imagine that with the Mt. Kilimanjaro!