- MACAPA I PILOT BOAT Tug 710003474 — CLASS B
- MACEDO I Fishing 710011377 — CLASS B
- MACHADO DE ASSIS Tanker 710029870 9453872 BRADR
- MAERSK GANGES Cargo 710007334 9694581 BRSSZ
- MAERSK TOPPER Other 710003667 9388584 OPENSEA
- MAGALHAES SILVA XII Fishing 710400753 — CLASS B
- MAGNIFICO Tug 710001685 — CLASS B
- MAIS Q VENCENDORQB Fishing 710019771 — CLASS B
- MAIS QUE ALEGRIA Passenger 710003644 — CLASS B
- MAITE - B1 Fishing 710123456 — CLASS B
- MAITE B2 Other 710123457 — —
- MAITE B3 Other 710123458 — —
- MAKAIO STAR Pleasure craft 710005571 — CLASS B
- MALDIVAS X Other 710400427 — —
- MALLUEE Pleasure craft 710006583 — CLASS B
- MALVADAO Fishing 710141872 — CLASS B
- MANDA VENTO Pleasure craft 710002364 — —
- MANDRIAO Other 710025950 9645542 RIO DE JANEIRO
- MANOEL ALVES Pleasure craft 710086000 — CLASS B
- MANOEL C MESSIAS Tug 710001154 — —
- MANU II Fishing 710030726 — CLASS B
- MANUELA PINHEIRO Fishing 710401055 — CLASS B
- MAR CRISTALINO Pleasure craft 710985540 — CLASS B
- MAR CRISTALINO MS Fishing 710220122 — CLASS B
- MAR CRISTALINO VP Fishing 710246812 — CLASS B
- MAR DA ENSEADA II Fishing 710123161 — CLASS B
- MAR DA POVOA Fishing 710001977 — CLASS B
- MAR DE ABROLHOS Pleasure craft 710327211 — —
- MAR LIMPO II Special purpose 710007570 9618757 PMAC
- MAR LIMPO III Other 710007580 9618769 FUNDEIO RJ
- MAR LIMPO IV Tug 710010930 9641259 BACIA DE CAMPOS
- MAR LIMPO V Special purpose 710010940 9641261 RIO DE JANEIRO
- MAR LIMPO VII Special purpose 710010960 9648154 P56
- MAR QUADRADO Sailing 710007377 — CLASS B
- MARASTRAL I Fishing 710100171 — CLASS B
- MARAVILHOS-B5 Other 710554222 — CLASS B
- MARBELLA I Fishing 710199012 — CLASS B
- MARC0.ANT0NIO P Fishing 710204978 — CLASS B
- MARCI Fishing 710131081 — CLASS B
- MARCILIO DIAS Tanker 710024830 9453858 BRADR
- MARCO ANTONIO I Fishing 710090004 — CLASS B
- MARCO ANTONIO PINHEI Fishing 710008225 — CLASS B
- MARCOS ANTONIO FF Other 710257892 — —
- MARCOS DIAS Cargo 710071000 9070565 SALVADOR
- MARCOS SILVA Other 710000963 — BARCARENA/ITAITUBA
- MARE NOSTRUM Special purpose 710006296 — —
- MARES CORAIS Fishing 710142987 — CLASS B
- MARES CORAIS BOIA 01 Other 710500275 — —
- MARES CORAIS BOIA 02 Other 710500378 — —
- MARFORT 13 Tug 710001258 — CLASS B
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