Side-by-side cruise ship comparison · Updated January 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)
Ultramarine
World Explorer
Gross Tonnage
Ultramarine
13,000 GT
World Explorer
9,300 GT
Length
Ultramarine
128 m
World Explorer
126 m
Beam
Ultramarine
20 m
World Explorer
19 m
Passengers
Ultramarine
199
World Explorer
176
Crew
Ultramarine
140
World Explorer
112
Decks
Ultramarine
—
World Explorer
—
Year Built
Ultramarine
2,021
World Explorer
2,019
Space Ratio
Ultramarine
65.3 GT/pax
World Explorer
52.8 GT/pax
Passenger:Crew Ratio
Ultramarine
1.42 :1
World Explorer
1.57 :1
| Specification | Ultramarine | World Explorer |
|---|---|---|
| Overview | ||
| Cruise Line | Quark Expeditions | Quark Expeditions |
| Class | Expedition | Expedition |
| Status | active | active |
| Year Built | 2,021Winner | 2,019 |
| Dimensions | ||
| Gross Tonnage | 13,000 GTWinner | 9,300 GT |
| Length | 128 mWinner | 126 m |
| Beam | 20 mWinner | |
| Capacity | ||
| Passengers | 199Winner | 176 |
| Crew | 140Winner | 112 |
| Key Ratios | ||
| Space Ratio | 65.3 GT/paxWinner | 52.8 GT/pax |
| Passenger:Crew Ratio | 1.42:1Winner | 1.57:1 |
| Build | ||
| Builder | Brodosplit | WestSea |
| Flag | Bahamas | Portugal |
| IMO Number | 9898840 | 9861680 |
Ultramarine
65 GT/pax means plenty of quiet space
1.4:1 passenger-crew ratio means exceptional service
Built in 2021 with modern facilities — great for a first cruise
Good range of onboard options
World Explorer
53 GT/pax means plenty of quiet space
1.6:1 passenger-crew ratio means exceptional service
Built in 2019 with modern facilities — great for a first cruise
Good range of onboard options
Free cancellation on most rooms
Bundle & save on your cruise trip
Medical, trip cancellation & luggage cover
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19 m |
| Draft | — | — |
| Decks | — | — |
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