Loadout abilities are what you can spawn with.
On-map abilities are equipment styled abilities that wouldn’t be balanced in loadouts. They could still be forced into loadouts via custom games options though.
Short Cooldown: 5-10 seconds
Significant: 10-15 seconds.
Long: 15-30 seconds.
Loadout Abilities
Hologram
Same as now except with an alternate fire. You can hold down the ability button to move and aim the hologram at the cost of more energy and being forced to stay in place. Short cooldown.
Teleporter
Allows you to place destructible teleports on the map, significant cooldown.
Target Lock
Alternative to Promethean vision. Allows you to feed enemy locations to your ally’s HUD (puts a red triangle above them) by aiming at them and pressing the ability button. Significant cooldown and enemies only show up within a small range of you and your allies.
Mounted Turret
Place down a user-mounted turret to support your team. Significant cooldown. Moderate damage to vehicles.
Thruster Pack
Slightly more range, allows you to hover while in use. Short Cooldown.
Mancannon
Alternative to jetpack. Shorter range, destructible version of on-map cannons, allows combat while in flight but only in a linear direction. Can be used to boost or oppose vehicles. Significant cooldown.
Noise Emitter
Alternative to Camo. Placed like radar jammer from Halo 3. Blurs vision and hampers hearing of those within its radius. Significant cooldown.
On-Map Abilities
The ability the player has equipped will show up above their head when they are aimed at.
Remote Controlled Sentinel
Allows you to spawn and control a Sentinel in the same manner as hologram. Damages user upon ‘death’. Long cooldown.
Sentry Gun
Buffed version of the campaign sentries, long cooldown, altered appearance.
Tripmines
Self explanatory, significant cooldown.
Jetpack
Self explanatory, short cooldown.
Regeneration Field
Better than Halo 4’s, worse than Halo 3’s. Significant cooldown.
Miscellaneous
Active Camo is a powerup again.