An Arknights Yesterday's Sea guide covering Labour Ration Store priorities, first-week sanity budgeting and when to drink sanity potions, the 150-pull pity rule and the date Clemensa joins the standard pool, plus how to keep free five-star Travelbone.
Applicable version: as of 2026-10-06 (Arknights has no version numbering; official announcements are the version anchor)
Arknights Yesterday's Sea at a Glance: Three Open Windows
The event stages run from October 9 at 12:00 to October 30 at 03:59 and unlock after clearing Main Story 1-10 . The main body, Rea-Iberia, runs to October 23 at 03:59, while the companion story line, "Our Iberia", opens a week later on October 16 at 16:00.
Salvage Plan and the store are two separate tracks
Salvage Plan is the mission track: it hands out the free five-star Travelbone, part of the Port Metropolis Guest Room furniture set, module materials, and the store currency, Future Spyglass. The Labour Ration Store is the spending side and stays open from October 9 to October 30 at 03:59.
How to handle the clash with Vector Breakthrough #3
Vector Breakthrough #3 opened on September 29 at 16:00 and closes on October 20 at 03:59, with milestones extended three extra days to October 23 at 03:59.Push those milestones to the outfit tier and then stop, because milestones only drop currency and give nothing extra once the tier is reached.
Three more things land in October
Mid-October brings the Arknights x National Library "Hengyuan Jinliang" login event, plus the Integrated Strategies expansion for Sunken Black Flow Forest Sea. Late October adds Museum of Sight: Evolution .Only Yesterday's Sea ships new operators.
Arknights Yesterday's Sea Labour Ration Store: What to Buy First
The store closes on October 30 at 03:59, a week after the stages. That extra week only covers leftovers, so set the order on day one instead of waiting until the currency piles up.
Outfit and permits come first
The two highest-value items are headhunting permits and the outfit "Poet's Holiday - Meteor" (Time Series). Permits convert straight into gacha value, with one pull costing 600 Orundum, and the outfit only returns later through the lookback exhibition rather than at its original price. Travelbone's tokens rank third, because they decide whether the five-star reaches full potential.
Material trades come later
Module materials and advanced growth materials sit in the "buy if short, defer if not" tier. LMD and battle records go last: the base and Annihilation supply both daily, while event currency only comes around once per event. If you are planning Arknights materials stockpiles, this order is the one to copy.
| Priority | Item | Reasoning | Deadline |
|---|---|---|---|
| 1 | Headhunting permits | Only item that converts into pulls | Oct 30, 03:59 |
| 2 | Poet's Holiday - Meteor outfit | Only returns via lookback exhibition | Oct 30, 03:59 |
| 3 | Travelbone tokens | Decides full potential | Oct 30, 03:59 |
| 4 | Module growth materials | Demand accumulates over time | Oct 30, 03:59 |
| 5 | Advanced growth materials | Shared by promotion and mastery | Oct 30, 03:59 |
| 6 | LMD / battle records | Base and Annihilation supply both | Oct 30, 03:59 |
Arknights Yesterday's Sea First-Week Sanity Plan
How to budget sanity
Natural regeneration runs about 240 points a day, so a week is roughly 1680 points. Event currency pays best in the first week, so do not clear potions early. Clear main-stage first-time rewards first and advance Salvage Plan before deciding which stage to farm.
When to actually drink potions
Save them for the back half. First-time clears are about beating the stage rather than farming currency, so weaker accounts save sanity by clearing them first and then drinking potions once the rotation is familiar. The event runs to October 30 at 03:59, so time is not the constraint.
Why Travelbone cannot be skipped
Travelbone is only obtainable inside Yesterday's Sea and is not added to Sea Abyss Cruise, any Standard Headhunting, or Mid-Year Headhunting.That means the operator disappears once the event ends, so push Salvage Plan progress ahead of farming extra materials.
Arknights Yesterday's Sea Banner: Clemensa, Pity and the Standard Pool
Two dates that decide the window
Sea Abyss Cruise runs from October 9 at 12:00 to October 23 at 03:59. The six-star Clemensa takes 50% of six-star rates, while five-stars De Toledo and Firesentry share 50% of five-star rates. The banner is a Standard Headhunting pool, so 150 consecutive pulls without the rate-up six-star guarantees it on the next six-star. Both new operators join the permanent standard pools after October 22 at 04:00, so the dedicated window is only two weeks.
Reading Clemensa's role
Community previews read Clemensa as an Origin Guard.Exact multipliers are not yet published, so treat official announcements as authoritative. The practical test is how many Origin-style carries you already own: with a built Origin core she is reinforcement, without one she justifies a pity budget.
What about De Toledo and Firesentry
The two five-stars only have rarity and rate published, with no mechanics shown yet . If you need a Guard slot, wait for live data; if you need a five-star utility pick, wait for reviews. A 50% split between two five-stars is a lot of variance for one chase.
Arknights Yesterday's Sea Packs and Base Additions
Are the packs worth it
The Guard Chip Pack gives 4 Guard Dualchips, 5 Guard Chips, and 45/25/10 of the technique summaries; the Port Gift Fund Box gives 13 Originite Prime and 300,000 LMD.The chip pack suits anyone committed to raising a Guard this patch, and the fund box suits players short on Prime.
Base additions are a long-term play
This patch adds a recycling station and an activity room to the base.Both pay out over the long term and are unrelated to event progress, so there is no need to rush them in week one. Scanning to add friends and a login-page polish arrived alongside them.
Arknights Yesterday's Sea FAQ
When does Yesterday's Sea end?
A: The stages run from October 9 at 12:00 to October 30 at 03:59; the companion story line closes on October 23 at 03:59.
Can I get a new operator without pulling?
A: Yes, one. The five-star Travelbone comes from the Salvage Plan missions and needs no headhunting, while Clemensa requires Sea Abyss Cruise.
Should I drink sanity potions now?
A: No. Push Vector Breakthrough #3 milestones to the outfit tier and stop, keeping roughly 1680 points of natural regeneration for the event opening on October 9 .
What is the pity on Sea Abyss Cruise?
A: 150 pulls. After 150 consecutive pulls without the rate-up six-star, the next six-star is guaranteed to be Clemensa, who takes 50% of six-star rates .
Do Producer Letter rewards expire?
A: Yes. Producer Letter #69 paid 200 Orundum and 5 Sugar Packs on September 25, and the mail lasts seven days.
Arknights Yesterday's Sea Action Checklist
- Clear the Producer Letter #69 mail today (200 Orundum, 5 Sugar Packs); it expires in seven days.
- Push Vector Breakthrough #3 milestones to the outfit tier before October 20 at 03:59, then stop spending sanity.
- After the October 9 opening, clear main stages first and advance Salvage Plan to the Travelbone reward.
- Buy permits and the limited outfit first in the store, Travelbone tokens third, LMD last.
- If you chase Sea Abyss Cruise, budget 150 pulls; Clemensa joins the standard pool after October 22 at 04:00.
- The store closes on October 30 at 03:59, so do not leave the last week for everything.
Timings and store priorities get revised on gghubs.com whenever the official schedule shifts.