---
type: User Story
title: "US-002: Unlock Base II navigation"
description: Let players earn toggleable particle guidance toward their established base.
status: done
---

# US-002: Unlock Base II navigation

As a **player with Base I**, I want visual guidance toward my base so that I can find it without relying on coordinates.

## Acceptance criteria

- [x] Base II requires Base I and an established base.
- [x] Base II unlocks at a configurable cumulative grass-or-dirt threshold that defaults to 500 blocks, 250 more than Base I.
- [x] Base II provides particle-based navigation and does not grant or require a physical compass item.
- [x] While enabled and in the base's world, particles are drawn along the ground only when the player is horizontally more than 25 blocks beyond the current base border.
- [x] No navigation particles appear inside the base, exactly 25 blocks beyond its border, or anywhere within that buffer.
- [x] Expansion and relocation update the navigation visibility threshold immediately.
- [x] Particle generation is bounded to avoid excessive server or client load.
- [x] A player in another world receives a clear message instead of a misleading particle direction.
- [x] `/basesettings navigation enable` enables guidance idempotently after Base II is unlocked, and `/basesettings navigation disable` disables it idempotently.
- [x] Invalid navigation arguments show command usage, and `enable` and `disable` are offered through autocomplete.
- [x] Grass-or-dirt progress after Base II preserves the player's selected navigation preference.
- [x] The navigation preference persists across reconnects and restarts.

## Related

- [US-001: Unlock and establish Base I](us-001-unlock-and-establish-base.md)
- [US-009: View progression and unlock notifications](us-009-view-progression-and-notifications.md)