| Previous | Current | ||
|---|---|---|---|
| Changes to Vessel Name | |||
| - | Ryuho Maru No. 37 | + | Mar Pionero |
| Changes to Effective Date | |||
| - | Wednesday, 14 December 1977 to Wednesday, 1 January 1986 | + | Wednesday, 1 January 1986 to Saturday, 1 February 1997 |
| Changes to Owner | |||
| + | Laspez Argentina SA | ||
| Changes to Flag | |||
| - | Japan | + | Argentina |