The McTony Robbery is one of the Salvage Yard Robberies in GTA Online's The Chop Shop DLC. The Planning Work missions involve acquiring Tony's Submersible and Sonar Equipment, which is important for the submarine infiltration, as well as an optional mission to disrupt enemy weapons.

These are the primary setup missions.

Planning Work missions are mandatory missions you must complete to do the robbery. There is always one optional disruption mission that helps make your final robbery mission relatively easier. You can start all your planning work missions from the planning screen by accessing the computer in your Salvage Yard.

As with all the robberies, The McTony Robbery also has two mandatory and one optional planning mission.

Planning Work 1: Tony's Submersible

In this planning mission, you must go to Elysian Island and steal Tony's submersible. This will be used to reach the underwater submarine with our target vehicle in the finale.

When you get to Elysian Island, you will find a lot of security guards.

It is best to take out the security team before you go for the submersible.

If you have an Oppressor Mark II, use it to quickly take out the enemies. A Buzzard will also work just fine.

Once you've taken out the security team, go to the top of the crane to use the release switch.
Release switch.

Once you use the switch, the submersible will be released and drop into the water.

Released submersible.

Now, you might have an idea of jumping off the crane into the water, but

    do not

do it. You won't make it and will instantly die.

When you get inside the submersible, you will get the drop-off location.

Taking out the guards inside the warehouse.

After taking out the guards inside the warehouse, get close to the wooden crates, and you will get an option to break them open.

Crate inside the warehouse.

There are 4-5 wooden crates, and the sonar equipment can be in any one of the crates. The crate is always random.

We got lucky and got the sonar equipment inside the first crate we broke open.

Once you've acquired the sonar equipment, deliver it to your Salvage Yard to complete the mission.

Delivering the sonar equipment to the salvage yard.

Planning Work 3: Disrupt Weapons (Optional)

This is an optional mission. However, we recommend you complete it as it weakens your enemies' weapons during the robbery.

Navigating the narrow spaces of the submarine while fighting your way to the vehicle can get quite hectic and dangerous. It is best to minimize the difficulty as much as possible.

Like the other robbery disruption missions, you only get 10 minutes to complete this mission. It is best to use a Buzzard or an Oppressor Mark II for this mission.

First, you need to break into a lockup. The lockup will have some enemies outside guarding it.

Eliminate the guards outside the lockup.
Lockup entrance.