Overview: The Sea Chart Archive in Ikariam
The Sea Chart Archive is a building whose levels affect travel time between islands. With each upgrade level, construction costs increase, whilst the time saved per visited island also grows.
In the Wiki information, the effect is shown via the number of islands visited – specifically as time savings at 5, 20 and 50 islands. The benefit thus scales with the size of your own sea network.
Function: Time Savings by Island Count
The effect of the Sea Chart Archive is stated in the Wiki data as a reduction of a base time. At level 1, the base time is 45m 36s, at level 40 it reaches 3d 2h.
- Level 1: −36s (5 islands), −5m 46s (20 islands), −20m 52s (50 islands)
- Level 10: −5m 35s (5 islands), −50m 16s (20 islands), −2h 53m (50 islands)
- Level 20: −10m 27s (5 islands), −1h 28m 13s (20 islands), −4h 51m 34s (50 islands)
- Level 30: −14m 42s (5 islands), −1h 57m 59s (20 islands), −6h 18m 26s (50 islands)
- Level 40: −18m 28s (5 islands), −2h 22m (20 islands), −7h 25m 5s (50 islands)
Upgrade Costs (reduced)
The Wiki table lists construction costs in reduced form. The following overview shows selected levels with their three reduced cost values.
| Level | reduced | reduced | reduced | Base Time |
|---|---|---|---|---|
| 1 | 312 | 186 | 86 | 45m 36s |
| 5 | 2.282 | 2.214 | 1.354 | 1h 16m |
| 10 | 7.123 | 7.607 | 4.724 | 2h 21m |
| 15 | 17.291 | 19.944 | 12.435 | 4h 15m |
| 20 | 38.684 | 48.170 / 47.899 | 30.076 | 7h 36m |
| 25 | 83.506 | 112.742 / 112.173 | 70.434 | 13h 31m |
| 30 | 177.722 | 260.467 / 259.214 | 162.762 | 23h 56m |
| 35 | 375.608 | 598.428 / 595.611 | 373.988 | 1d 18h |
| 40 | 791.237 | 1.371.600 / 1.365.203 | 857.220 | 3d 2h |
Scaling of Benefits
The Wiki values show that time savings per island increase with each level, whilst the base time also rises. At level 1, 45m 36s of base time is offset by savings of 20m 52s at 50 islands; at level 40, it is 3d 2h of base time and 7h 25m 5s of savings at 50 islands.
The savings for 5 islands remain limited in absolute terms (Level 1: −36s, Level 40: −18m 28s), whilst the savings at 50 islands increase noticeably with the level.
FAQ
How many upgrade levels does the Sea Chart Archive have?
The Wiki table lists values from level 1 to level 40.
How much time is saved at maximum level?
According to the Wiki, the savings at level 40 are −18m 28s at 5 islands, −2h 22m at 20 islands and −7h 25m 5s at 50 islands.
What is the base time at level 1 and level 40?
At level 1 it is 45m 36s, at level 40 it is 3d 2h.