- 🇬🇧SARA LIFEBOAT 1 8 m · Search and rescue vessel 235112902 — CLASS B
- 🇬🇧SARA LIFEBOAT 2 Search and rescue vessel 232020105 — CLASS B
- 🇬🇧SARA LIFEBOAT 4 Search and rescue vessel 235114707 — —
- 🇳🇱SARAH 13 m · Dredger 244020640 — ONDERHOUD ZH
- 🇺🇸SARAH 208 m 367003880 — US^0SNF → 0SNU
- 🇿🇦SARAH 13 m · Dredger 601887900 — CLASS B
- 🇿🇦SARAH BAARTMAN 82 m · Law enforcement vessel 601739000 — CAPE TOWN
- 🇺🇸SARAH D 207 m 367045970 — HOUSTON
- 🇺🇸SARAH D 151 m 367177370 7400510 XX XXX → US^0Y79
- 🇺🇸SARAH GOLDING 115 m 367619730 — US^0SE6 → 0X07
- 🇺🇸SARAH L INGRAM 355 m 366967510 — USPAH
- 🇵🇦SARAMACCA 71 m · Dredger 352898718 8003424 IDKU
- 🇬🇧SARINA OF THE SEAS Port tender 235111953 — CLASS B
- 🇨🇦SARNIA FIRE MARINE 1 6 m · Search and rescue vessel 316005168 — CLASS B
- 🇳🇴SARPEN 14 m · Diving support vessel 257056810 — CH 16 FOR
- 🇦🇺SARV AURORA XSTRATA 6 m · Search and rescue vessel 503585400 — CLASS B
- 🇺🇸SARVIS 12 m · Dredger 368453570 — OCN CTY
- 🇺🇸SAS S/V WRIGHT — 338924171 — CLASS B
- 🇳🇱SASKIA 12 m · Dredger 244770474 — —
- 🇮🇩SATRIA ANUGERAH 1 90 m · Dredger 525400738 — —
- 🇰🇿SATTI Noncombatant ship 436000228 9668207 AKTAU
- 🇨🇦SATURNA SENTINEL 17 m · Anti-pollution vessel 316048139 — VANISL
- 🇫🇮SAUKKO 12 m · Search and rescue vessel 230157180 — CLASS B
- 🇪🇸SAULO 6 m · Diving support vessel 225995895 — CLASS B
- 🇪🇸SAULO I 12 m · Dredger 225997620 — CLASS B
- 🇲🇹SAULUS 59 m · Dredger 256269000 8899122 SPOIL GRND
- 🇨🇦SAUVETAGE VARENNES Search and rescue vessel 316044881 — CLASS B
- 🇺🇸SAVANNAH 71 m · Dredger 368048660 — —
- 🇺🇸SAVIOUR 207 m 367151460 — US^0YYF → 070S
- 🇸🇪SAXKRAN NR2 20 m · Port tender 265606380 — PORTGOT
- 🇳🇱SB 28 16 m · Dredger 244620855 — THOLEN
- 🇩🇪SB WESEL 55 m · Dredger 211652780 — WESEL
- 🇦🇷SB-15 TANGO Law enforcement vessel 701006248 — BUENOS AIRES
- 🇦🇺SB11 11 m · Search and rescue vessel 503188940 — CLASS B
- 🇭🇰SB22 10 m · Search and rescue vessel 477996943 — —
- 🇳🇱SBB02 Law enforcement vessel 244140104 — CLASS B
- 🇺🇸SBFD MARINE 26 8 m · Search and rescue vessel 338488298 — —
- 🇧🇴SBS EXPRESS 38 m · Pilot vessel 720226000 — B 2 A
- 🇸🇬SC 0542A Port tender 563041161 — CLASS B
- 🇬🇧SC AGATE 17 m · Port tender 235116836 — RODBY
- 🇬🇧SC AMBER 17 m · Port tender 235116828 — FEHMARN TUNNEL VSL
- 🇳🇱SC AMETHYST 20 m · Pilot vessel 246753000 9685229 NLRTM
- 🇳🇱SC ANNA 18 m · Port tender 244800000 — BUSUM
- 🇬🇧SC ELAN 14 m · Port tender 235109621 — VEERE P41
- 🇳🇱SC FALCON 18 m · Port tender 246812000 — BARTH
- 🇳🇱SC LYNX 18 m · Port tender 244578000 8656635 WEMELDINGE
- 🇳🇱SC ONYX 24 m · Port tender 244834000 — ESBJERG-HR1-ESBJERG
- 🇳🇱SC ROOS 17 m · Port tender 244112000 — RTM ANCHORAGE
- 🇳🇱SC RUBY 23 m · Port tender 244349000 — ANCHORAGE SERVICES
- 🇸🇬SC4928C Port tender 563069510 — CLASS B
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