History of Beacon's Guidance

Beacon's Guidance is a Season of Plunder triumph: "Use the Treasure Beacons to decipher the location of the hidden treasure." It is one of the triumphs for the Scallywag title and seal.

How to complete

1. Rank up with the Star Chart vendor in the HELM. Reaching ranks 7, 10 and 16 each grants a Small, Medium and Large Treasure Beacon, which start the three Cryptic Quatrains treasure-hunt quests.
2. Follow each quatrain's riddle. Per iGamesNews, Quatrain 1 sends you to the K1 Revelation Lost Sector on the Moon, then a Strike (the Fallen SABER on the Cosmodrome), then a dig site on Europa. Quatrain 2 uses the Bay of Drowned Wishes Lost Sector in the Dreaming City, the Lake of Shadows Strike in the EDZ, an Expedition with a Sword equipped, and a dig on Nessus near the Cistern. Quatrain 3 details were not confirmed by the sources I opened.
3. Using all three beacon types completes the triumph. Each finished quest also gives a Crude Cipher Fragment toward the Raw Cipher for Captain's Atlas.

Rewards

Triumph score, progress toward the Scallywag seal, and per search-result summaries the Charge of Light Exotic Sparrow for finishing all three beacons (not verified on a page I opened).

Seasonal content: this was only available in Season of Plunder, so check in-game whether it is still obtainable.