Nummer: 25905
| Area : | Indic Ocean |
| Date of attack : | 25.01.1942 |
| Time of attack : | 18:16 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-159 |
| Commander : | Yoshimatsu |
| Grid : | Sabang Roads |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 7000 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Giang Seng (?) |
| Year of launch : | 1899 |
| Actual tonnage : | 1811 BRT |
| Footnote : | I-159 entered the roads of Sabang, sank one freighter and captured a part of the British crew. - "Giang Seng" is officially claimed to be scuttled on Mar.2nd at Surabaya. |
| updated on: | 00.09.2008 |
| Remark: | Giang Seng |
| Changes: | 1) sensuikan sagt "versenkt von I-159 in Sabang" 2) Lloyds War Losses (p.366): Am 2.3.42 selbstversenkt Sourabaya. |