Scales differ. Sheet consisting of eighteen ungraduated sketch plans taken from Dutch charts.
1. Sangir I. South Coast - Dago Bay 1:20,200;
2. Sangir I. South East Coast - Ngalipaeng Bay 1:20,200;
3. Sangir I. East Coast - Miulu Anchorage 1:20,200;
4. Sangir I. - Tabukan Road 1:20,200;
5. Sangir I. - Petta Anchorage circa 1:11,000;
6. Sangir I. - Kulur Anchorage circa 1:10,000;
7. Talauer Is., Karakelang I., West Coast - Esang Bay circa 1:20, 000;
8. " ", North East Coast - Arangkaa Anchorage 1:20,200;
9. " ", West Coast - Samboara Bay 1:20,000;
10. " " " - Beo Bay circa 1:10,000;
11. " Salibabu I. East Coast - Lirung Road circa 1:20,000;
12. " " South West Coast - Seree Bay circa 1:16,000;
13. Biarro I., North Coast, North Bay circa 1:35,000;
14. Nanusa Is. - Karaton Anchorage 1:15,030;
15. Siau I., East Coast - Sawan and Ulu Roads 1:57,340;
16. Siau I. - Kampong Ulu Anchorage circa 1:6,000;
17. Karkaralong Is., Meares Is. West Coast - Kawio Anchorage 1:20,100;
18. Channel between Tangulandang and Ruang circa 1:60,000.