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Length-data coverage

Selected category: Missing / unusable

2,022 matching records / counted units

These are the same counted units and category assignments used in the summary snapshot, calculated 18 Sep 2026, 05:26 BST. Names are not automatically reconciled to unique vessels or people. Pagination shows 30 at a time; it does not limit the full result set.

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1,171 / 2,022 · vessel

MARSWORTH

Indexes
Vessel register only
Type
Coaster
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1328

Vessel research record →
1,172 / 2,022 · vessel

MARY

Indexes
Vessel register only
Type
Unrecorded / conflicting
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1240, 1312, 1333, 1341

Vessel research record →
1,173 / 2,022 · vessel

MARY ANN

Indexes
Vessel register only
Type
Barge
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1235

Vessel research record →
1,174 / 2,022 · vessel

MARY BIRCH

Indexes
Vessel register only
Type
Barge
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1317

Vessel research record →
1,175 / 2,022 · vessel

MARY ELIEZER

Indexes
Vessel register only
Type
Sailing Barge
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1245

Vessel research record →
1,176 / 2,022 · vessel

MARY HOWARD

Indexes
Vessel register only
Type
D
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1250

Vessel research record →
1,177 / 2,022 · vessel

MARY ROSE

Indexes
In both indexes
Type
Motor Yacht
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1327 · Orde 1133, 1138

Vessel research record →
1,178 / 2,022 · vessel

MARY SPEARING

Indexes
In both indexes
Type
Thames Launch
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1255 · Orde 297

Vessel research record →
1,179 / 2,022 · vessel

MARY SPEARING II

Indexes
In both indexes
Type
Thames Launch
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1332 · Orde 284

Vessel research record →
1,180 / 2,022 · vessel

MASTERPIECE FE145

Indexes
Vessel register only
Type
Fishing Vessel
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1336

Vessel research record →
1,181 / 2,022 · vessel

MATA HARI

Indexes
Vessel register only
Type
Motor Boat
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1284

Vessel research record →
1,182 / 2,022 · vessel

MATILDA

Indexes
Vessel register only
Type
Motor Boat
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1342

Vessel research record →
1,183 / 2,022 · vessel

MAUD BEATRICE

Indexes
Vessel register only
Type
Motor Boat
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1347

Vessel research record →
1,184 / 2,022 · vessel

MAURICE ROSE

Indexes
Vessel register only
Type
A
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1260

Vessel research record →
1,185 / 2,022 · vessel

MAVIS

Indexes
Vessel register only
Type
D
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1352

Vessel research record →
1,186 / 2,022 · vessel

MAX

Indexes
Vessel register only
Type
Belgian Harbour Tug
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1265

Vessel research record →
1,187 / 2,022 · vessel

MAY C

Indexes
Vessel register only
Type
Tug
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1289

Vessel research record →
1,188 / 2,022 · vessel

MAY QUEEN

Indexes
Vessel register only
Type
Shoreham Fishing Vessel
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1270

Vessel research record →
1,189 / 2,022 · vessel

MAYBELLE

Indexes
Vessel register only
Type
D
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1357

Vessel research record →
1,190 / 2,022 · vessel

MAYFLOWER RX289

Indexes
Vessel register only
Type
Penzance Fishing Vessel
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1294

Vessel research record →
1,191 / 2,022 · vessel

MAYON CASTLE

Indexes
Vessel register only
Type
D
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1307

Vessel research record →
1,192 / 2,022 · vessel

MAYSPEAR

Indexes
Vessel register only
Type
Possibly Mary Spearing
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1275

Vessel research record →
1,193 / 2,022 · vessel

MB 275

Indexes
Vessel register only
Type
Motor Boat
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1180

Vessel research record →
1,194 / 2,022 · vessel

MEANDER

Indexes
In both indexes
Type
Motor Yacht
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1280 · Orde 688

Vessel research record →
1,195 / 2,022 · vessel

MEDORA

Indexes
In both indexes
Type
Wherry
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1299 · Orde 1437

Vessel research record →
1,196 / 2,022 · vessel

MEG

Indexes
Vessel register only
Type
D
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1362

Vessel research record →
1,197 / 2,022 · vessel

MEKNES

Indexes
Vessel register only
Type
French Cargo Ship
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1351

Vessel research record →
1,198 / 2,022 · vessel

MELPOMENE

Indexes
Vessel register only
Type
D
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1356

Vessel research record →
1,199 / 2,022 · vessel

MERIGNAC

Indexes
Vessel register only
Type
D
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1361

Vessel research record →
1,200 / 2,022 · vessel

MERLIN

Indexes
Vessel register only
Type
Motor Boat
Usable length (ft)
Not recorded / not usable for this calculation
Usable build year
Not recorded / not usable for this calculation

Counted source identifiers: vessel register 1367

Vessel research record →