
Bianca C
Bianca C Wreck · Grenada
180-meter Italian Costa Line cruise liner that caught fire and exploded in her boiler room on October 22, 1961 while anchored off St. George's; a Royal Navy frigate tried to tow her clear but the line parted in a squall and she sank on October 24 about a mile off Grand Anse Beach. The largest diveable wreck in the Caribbean lies upright on sand with her bow at roughly 27 m and the stern at 50 m, the hull split aft of midships in 1992 by Hurricane Lenny. Divers descend a shotline straight onto the bridge and superstructure, swim past the swimming pool deck draped in black coral and gorgonians, and drift along the hull as eagle rays, horse eye jacks, barracuda, and occasional reef sharks pass overhead. The Times has named it one of the top ten wreck dives in the world.
Conditions
Depth
27 to 50 m
Advanced depths
Current
Often strong
Can pick up on the edge
Visibility
15 to 30 m
Clearest in the calm season
Water
26 to 30°C
Shorty or skin
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 26 | 26 | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 26 |
| Vis (m) | 25 | 25 | 25 | 25 | 20 | 18 | 15 | 15 | 15 | 18 | 20 | 25 |
| Current | Moderate | Moderate | Moderate | Moderate | Moderate | Strong | Strong | Strong | Strong | Strong | Moderate | Moderate |
Your chances of seeing each animal
Eagle ray
Last confirmed May 15, 2026 · 130 records
Almost always
Nearly every dive
Horse-eye jack
Last confirmed Dec 7, 2025 · 1 records
Likely
About 6 in 10 dives
Great barracuda
Last confirmed Nov 24, 2024 · 1 records
Rare
Now and then
Hawksbill turtle
Expected
Known here, not yet in recent logs
Black coral
Expected
Known here, not yet in recent logs
Caribbean reef shark
Expected
Known here, not yet in recent logs
Goliath grouper
Expected
Known here, not yet in recent logs
Gear