Castaways

Castaways are non-player characters that can be found in the Arc by finding a message in a bottle and using the treasure map contained in the bottle to locate the castaway. Progress of which castaways the player has found can be seen in the Arc Journal. Each castaway will award the player a taijitu after being talked to for the first time. Finding all the castaways completes Castaways of the Arc and unlocks the [Name] the Castaway title.

Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory. The castaways are marked as found in the Arc Journal after actually interacting with them on their islands.

Different bottles are available on different days, with the available bottles changing at daily reset (00:00 UTC) and the bottles appear on the same day for everyone. Each bottle has a unique cycle, becoming visible once every few days. The cycle is a cycle of one day for the first bottle, two days for the second bottle, three days for third bottle, etc.

Speaking to Quartermaster Gully with any treasure map in your inventory will prompt him to ask if you'd like to travel to the island where the respective castaway can be found.

Requirements

Some messages in a bottle are not possible to obtain without additional requirements:

• Completion of the Spiritual Enlightenment miniquest is required to access the spirit realm of Aminishi (requiring 90 Slayer).
• 90 Divination is required to access the second and third islands on The Islands That Once Were Turtles.
• 100 ancestral energy is required to charge the second and third tortle portals on The Islands That Once Were Turtles.

Castaways

Read the above for detailed information as to why bottles can appear on other days.

Castaway		Island	Message	Treasure map	Visibility	Bottle location	Map
	Milky Joel	Milky Bay			This message in a bottle is currently visible. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.	Found on the south-east end of the beach in Waiko.
	One-Eyed Willy	The Goon Docks			This message in a bottle was last visible 1 day ago on 23 January. It will be visible again in 1 day on 25 January. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.	Found at the edge of the water on the southern beach of Whale's Maw, east of the dock and west of The Whaler.
	Manti Claws	Christmas Island			This message in a bottle was last visible 2 days ago on 22 January. It will be visible again in 1 day on 25 January. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.	Found within the Spirit Realm of Aminishi on the western beach, below where the Aminishi moai resides before being transplanted during the Head of the Family miniquest.
	Swabbie Steve	The Island Which May or May Not Have Monkeys on It			This message in a bottle was last visible 3 days ago on 21 January. It will be visible again in 1 day on 25 January. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.	Found on Aminishi. It is located on the south-east beach and south of the campfire
	TzHaar-Ga'al-Knot	Springbreak Island			This message in a bottle was last visible 1 day ago on 23 January. It will be visible again in 4 days on 28 January. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.	Found on the north-west beach of Waiko, north-west of Rosie.
	The Cannonballs	Cannonball Run			This message in a bottle was last visible 5 days ago on 19 January. It will be visible again in 1 day on 25 January. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.	Found on the southern shore of Cyclosis, south-east of the positive energy wisp.
	Azalea Oakheart	Eisetes Cretor			This message in a bottle was last visible 5 days ago on 19 January. It will be visible again in 2 days on 26 January. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.	Found on the northern shore of the first island in The Islands That Once Were Turtles network, north of the northern mushroom cluster.
	Harley	The Hamlet			This message in a bottle was last visible 7 days ago on 17 January. It will be visible again in 1 day on 25 January. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.	Found on the southern shore of the second island in The Islands That Once Were Turtles network, by the tortle portal to the third island.
	Squick	Quis-land			This message in a bottle was last visible 8 days ago on 16 January. It will be visible again in 1 day on 25 January. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.	Found on the west side of the third island in The Islands That Once Were Turtles, semi-hidden underneath the south-western rocks, western side.
	Salmon Ella	Agar Atoll			This message in a bottle was last visible 1 day ago on 23 January. It will be visible again in 9 days on 2 February. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.	Found next to the southern dock exit on Goshima.

Update history

This information has been compiled as part of the update history project. Some updates may not be included - see here for how to help out!

• patch 1 August 2016 (Update):
  • Corrected some typos for the Arc castaways.

Trivia

• It is possible for every castaways' message to sync, all becoming visible on the same day, once every 2,520 days (the least common multiple of all numbers from 1 to 10). The next date this will occur is 9 November 2022, Runedate 7560.