Preparatory tasks for The Cargo Ship Robbery in GTA Online's The Chop Shop DLC include securing bolt cutters, a suitable boat, and flares for signaling, with optional masks, all of which are essential before undertaking the main Planning Work missions.

Tasks are considered one of the major prerequisites of the robbery, except the optional tasks, which are not mandatory.

You can see your tasks laid out on the planning screen. However, you cannot start your tasks from the planning screen. These are available for you to complete in free roam.

You can identify these tasks called 'Robbery Tasks' on the map, represented by a green duffle bag.

When you go to the task location, you will see a green highlighted circle on the ground.

The classic GTA franchise signature mission starting icon.

Walk up to the green marker, and you will get an option to interact with it to start the task.

For the Cargo Ship robbery, you have three mandatory and one optional task.

Task 1: Bolt Cutters

In this task, you need to steal the bolt cutters from the marked site. You will see a yellow highlighted area on your minimap. The bolt cutters can be anywhere inside this area.

The most common building with bolt cutters is the long warehouse.

The warehouse with the bolt cutters for us. The majority of the highlighted circle is covering it on the minimap.