Apocalypse's Sister

Description: Surely we can't run this back... right? Anyways all these images will lead you to the course of one very life-threatening structure. Find her sister's number.

flag format: boroCTF{number}

---

We have provided with some random planet images,

1. unknown
2. Antarctica
3. South Georgia Island
4. Edinburgh of the Seven Seas
5. Saint Helena
6. Saint Helena
7. Cape Verde
8. Port of Granadilla (Tenerife, Canary Islands)
9. Rotterdam, Netherlands

https://www.cruisemapper.com/ships/MV-Hondius-1624

https://www.cruisemapper.com/ships/MV-Janssonius-1655

boroCTF{311875984}