Side-by-side cruise ship comparison · Updated February 2026
across 5 categories
Size
Based on gross tonnage and length
Capacity
Based on passengers and crew
Modernity
Based on year built
Service
Based on passenger-to-crew ratio (lower is better)
Spaciousness
Based on gross tonnage per passenger (higher is better)
National Geographic Sea Bird
National Geographic Sea Lion
Gross Tonnage
National Geographic Sea Bird
100 GT
National Geographic Sea Lion
100 GT
Length
National Geographic Sea Bird
46 m
National Geographic Sea Lion
46 m
Beam
National Geographic Sea Bird
10 m
National Geographic Sea Lion
10 m
Passengers
National Geographic Sea Bird
62
National Geographic Sea Lion
62
Crew
National Geographic Sea Bird
25
National Geographic Sea Lion
25
Decks
National Geographic Sea Bird
—
National Geographic Sea Lion
—
Year Built
National Geographic Sea Bird
1,982
National Geographic Sea Lion
1,982
Space Ratio
National Geographic Sea Bird
1.6 GT/pax
National Geographic Sea Lion
1.6 GT/pax
Passenger:Crew Ratio
National Geographic Sea Bird
2.48 :1
National Geographic Sea Lion
2.48 :1
| Specification | National Geographic Sea Bird | National Geographic Sea Lion |
|---|---|---|
| Overview | ||
| Cruise Line | Lindblad Expeditions | Lindblad Expeditions |
| Class | Expedition | Expedition |
| Status | active | active |
| Year Built | 1,982 | 1,982 |
| Dimensions | ||
| Gross Tonnage | 100 GT | 100 GT |
| Length | 46 m | 46 m |
| Beam | 10 m | 10 m |
| Draft | — | — |
| Decks | — | — |
| Capacity | ||
| Passengers | 62 | 62 |
| Crew | 25 | 25 |
| Key Ratios | ||
| Space Ratio | 1.6 GT/pax | 1.6 GT/pax |
| Passenger:Crew Ratio | 2.48:1 | 2.48:1 |
| Build | ||
| Builder | Whidbey Island | Whidbey Island |
| Flag | United States | United States |
| IMO Number | 8314706 | 8314718 |
National Geographic Sea Bird
Good value for money
Comfortable atmosphere for two
Premium onboard experience
Well-suited for cruise newcomers
National Geographic Sea Lion
Good value for money
Comfortable atmosphere for two
Premium onboard experience
Well-suited for cruise newcomers
Free cancellation on most rooms
Bundle & save on your cruise trip
Medical, trip cancellation & luggage cover
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