This Crew Capsule was launched on 19 May 2022 with a United Launch Alliance Atlas 5 and a Centaur second stage from Complex 41 Cape Canaveral Space Force Station. On top of the 52 m tall rocket was the Boeing owned CST (= Crew Space Transporter) for its 2nd unpiloted Orbital Flight Test (OFT-2). It has a launch mass of 13000 kg, is 4,6m wide and has a crew capacity of 7 persons. The first uncrewed test flight took place in December 2019. An internal mission timer anomaly caused a series of maneuvers at an incorrect time. Hardware issues delayed the launch by nine months.

A second attempt in August 2021 was canceled due to problems with valves in the spacecraft's propulsion systems.

This time there were no astronauts on the Starliner spacecraft but the human-rated ship is designed to carry people to and from the space station. 26 hours after liftoff the crew capsule docked at the forward of the station’s Harmony module autonomously. The sevenperson crew on the International Space Station monitored the spacecraft’s approach. The astronauts spent several days performing tests and unpacking 230 kilogrammes of food, electronics, tanks with breathable air and replaced it with 275 kg of cargo for return to Earth.

Starliner's only “passenger” named “Rosie* the Riveter” is an instrumented mannequin that carries 15 sensors to collect data. The OFT-2 crew also tested their ability to send commands to the Starliner.
Rosie the Riveter is een allegorical icon of World War II , representing the women who worked in factories during WW II replacing the male workers who joined the military. Rosie the Rocketeer is the crash test dummy tasked with riding inside Boeing's Starliner capsule.

To conclude the 6 day mission, the crew module, designed for reuse, jettisoned its disposable service module that burned up during re-entry over the Pacific Ocean, At 900 meter altitude deployed parachutes and inflated 6 airbags to cushion for landing at White Sands Space Harber part of the US Army White Sands Missile Range in New Mexico. The Starliner’s landing occurred about four hours after the Starliner capsule undocked from the station.

“We’re really pleased with the mission,” said Mark Nappi, a Boeing vice president and manager of the Starliner program. “All of the objectives of the demonstration have been satisfied. The next step is to really dig down into all the details of the mission.”

The reusable crew module is designed for up to 10 flights to space. and will be launched again on the first Starliner crew rotation mission to the space station. Boeing has two space-rated Starliner crew modules. The other spacecraft is being readied for the Crew Flight Test.

USS Portland (LPD-27) is a San Antonio-class amphibious transport dock ship of the United States Navy, named after the city of Portland in the state of Oregon.
The ship was built from 2 August 2013 at the Ingalls shipyard in Pascagoula, Mississippi. The Portland was completed in February 2016 and was handed over to the Navy in December 2017.
After Orion's successful flight around the moon, the spacecraft landed in the Pacific Ocean opposite San Diego, California, on 11 December 2022. The capsule was retrieved by the amphibious transport ship USS Portland (LPD-27) and transferred to the US naval base at San Diego, California.

Covers also exist with the red stamping NASNI, SAN DIEGO, CA, 92135 where NASNI stands for Naval Air Station North Island, at the northern end of the Coronado Peninsula in San Diego Bay in San Diego, California.
It is part of the largest aerospace industrial complex in the US Navy - Naval Base Coronado (NBC), and home to several US Navy aircraft carriers.

Unlike the SpaceX salvage ships, there were a (limited) number of covers on board here. USS Portland and sister ships USS John P. Muir and USS Anchorage are three of the six San Antonio Class LPD (Landing Platform Docks) amphibious ships NASA plans to use in the Artemis programme.
USS Portland (LPD-27) was the lead recovery ship, with assistance from USS Montgomery (LCS-8).

After long negotiations, the Navy, Strike Force Three at San Diego naval base, agreed to take a total of 290 covers (150 US format + 140 monarch (190.5x98.5) ) aboard the USS Portland. Almost all 290 covers were stamped with the USS Portland's rubber stamp in black ink.
Another rubber stamp was also used, with red and blue ink, designed by Detlev van Ravenswaay, Bonn, Germany, already employed by US Postal Services since the 1980s for numerous space-related special stamps.

Covers also exist with the red stamping NASNI, SAN DIEGO, CA, 92135 where NASNI stands for Naval Air Station North Island, at the northern end of the Coronado Peninsula in San Diego Bay in San Diego, California.
It is part of the largest aerospace industrial complex in the US Navy - Naval Base Coronado (NBC), and home to several US Navy aircraft carriers.

Unlike the SpaceX salvage ships, there were a (limited) number of covers on board here. USS Portland and sister ships USS John P. Muir and USS Anchorage are three of the six San Antonio Class LPD (Landing Platform Docks) amphibious ships NASA plans to use in the Artemis programme.
USS Portland (LPD-27) was the lead recovery ship, with assistance from USS Montgomery (LCS-8).

After long negotiations, the Navy, Strike Force Three at San Diego naval base, agreed to take a total of 290 covers (150 US format + 140 monarch (190.5x98.5) ) aboard the USS Portland. Almost all 290 covers were stamped with the USS Portland's rubber stamp in black ink.
Another rubber stamp was also used, with red and blue ink, designed by Detlev van Ravenswaay, Bonn, Germany, already employed by US Postal Services since the 1980s for numerous space-related special stamps.

Although not confirmed, in addition to the 290 known covers, around a hundred other covers would have been on board the USS Portland, so the total number of letters from the salvage ship can be estimated at 400. Stefan Bruylants

Sources:
- Collect Space (text)
- Covers with permission of Ken Havekotte, Ross Smith, Stephen Stein, David Silcox
- Angelfire.com (by Ross Smith)
- Wikipedia