Over an unreliable RF link, "sent" isn't "received". LANCE waits for a real acknowledgement from the receiving plugin before it marks an object as delivered, so the green state on your map reflects ground truth — not just that a packet left the radio.
Markers are carried as compact mesh objects and reconstructed as native ATAK markers on the receiver — type and position intact. To save space, the receiver assigns its own short name, paired with a unique ID so there's never any confusion about which marker is which.
Pro adds network-wide marker delete: clear an object from every connected client, not just your own map. On Enterprise, delete can be governed and centrally controlled as part of organizational policy.
Each acknowledged marker action costs roughly a second of shared channel airtime once the ACK is counted. That's reliable, but it isn't free — so LANCE is designed for deliberate marker traffic, with rate and ACK controls expanding on Pro.