Cargo delivery is a job that you an work on waterdeep.

Once you visit a job site you can be hired as a cargo delivery driver for airships.

To start take your airship to a cargo courier and request a cargo job.

The first 50 jobs only require you to deliver a single cargo crate.

After that you have to deliver 2 crates.

Once the crate is at the destination unload it and comeplete the job.

usually you will repark your ship after you complete your cargo as well

cargo — List page from Classic Sites