What was the CMS Shackleton?

The CMS Shackleton was a ship of the Sovereign Colonies flotilla dispatched to Tau Volantis. It most likely supported ground operations there and was probably destroyed along with most of the Armed Forces fleet during the Scenario Five command.

Was the CMS Shackleton a warship?

Its exact classification was never confirmed, but it was likely a warship armed with tracking and homing mines, comparable in size to a heavy fire support vessel of the Sovereign Colonies Armed Forces.

How is the CMS Shackleton named?

Like other ships of the fleet, the Shackleton was named after a famous and ill-fated explorer, in this case the Anglo-Irish explorer Ernest Shackleton, who died of a heart attack just before an Antarctic expedition in 1922.

CMS Shackleton

Sovereign Colonies Warship at Tau Volantis

The CMS Shackleton was a Sovereign Colonies warship sent with the flotilla to Tau Volantis two centuries before the Marker convergence. Reduced to a field of mine-strewn wreckage, it was the first vessel of the lost fleet that Isaac Clarke passed on his arrival at the frozen world.

By Joe GarrattPublished 2 Jun 2026

The CMS Shackleton was a ship of the Sovereign Colonies flotilla sent to Tau Volantis, the frozen world that the records named the Marker homeworld. By the time later visitors reached the planet, the Shackleton survived only as a field of shattered, mine-strewn debris, the wreck of one more vessel lost with the Armed Forces fleet.

TL;DR

The CMS Shackleton was a warship of the Sovereign Colonies flotilla dispatched to Tau Volantis, where it most likely supported ground operations. It was probably destroyed along with most of the Armed Forces fleet during the Scenario Five command. Two centuries later, the section of hull plating seen as the USM Eudora arrived at Tau Volantis belonged to the Shackleton, making it the first ship of the lost fleet encountered there. Its classification was never confirmed, but it was likely a heavy fire support warship armed with tracking and homing mines, of a size between the CMS Terra Nova and the CMS Greely. After his life vessel ejected from the Eudora, Isaac Clarke lost his grip and had to make his way past the mine-dotted remains of the ship to reach Captain Norton's crew. So little of the Shackleton remained that it never appeared on later navigational guides of the wreckage.

Service at Tau Volantis#

The CMS Shackleton was dispatched to Tau Volantis along with several other Sovereign Colonies vessels, the same expedition that included the CMS Terra Nova, the CMS Greely, the CMS Crozier, and the CMS Roanoke. Once in orbit it most likely supported the ground operations on the planet below. It was probably destroyed along with most of the Armed Forces fleet during the Scenario Five command, the order under which the fleet turned on itself to keep the Marker threat contained.

Its exact classification was never confirmed, but it was likely a warship armed with tracking and homing mines, comparable to a heavy fire support vessel of the Sovereign Colonies Armed Forces and roughly between the Terra Nova and the Greely in size.

Wreckage#

Two centuries later, the Shackleton was the first ship of the lost fleet that the new arrivals passed. The section of hull plating that drifted into view as the USM Eudora emerged at Tau Volantis belonged to the Shackleton. After his life vessel was ejected from the Eudora, Isaac Clarke lost his grip on the compartment and had to make his way through the many mine-dotted chunks of the ship's remains to reach the crew of Captain Robert Norton. So little of the Shackleton survived that it never appeared on the later navigational guides of the debris field, the damage having all but obliterated it.

Frequently asked questions

What was the CMS Shackleton?: The CMS Shackleton was a ship of the Sovereign Colonies flotilla dispatched to Tau Volantis. It most likely supported ground operations there and was probably destroyed along with most of the Armed Forces fleet during the Scenario Five command.
Was the CMS Shackleton a warship?: Its exact classification was never confirmed, but it was likely a warship armed with tracking and homing mines, comparable in size to a heavy fire support vessel of the Sovereign Colonies Armed Forces.
How is the CMS Shackleton named?: Like other ships of the fleet, the Shackleton was named after a famous and ill-fated explorer, in this case the Anglo-Irish explorer Ernest Shackleton, who died of a heart attack just before an Antarctic expedition in 1922.

Sources

WikiCMS Shackleton — Dead Space Wiki entry

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