| Fork. | Forklaring |
| L | Finland (gl. nationsbogstav) |
| l&d | Loss and Damage |
| l&r | Lake & Rail |
| L. | Ler |
| l. | lys |
| L.D.D | Forkortelse (Lazy, Drunk and Disorderly) anført i søfolks papirer ved afmønstring, evnt. i søfartsbog, især udenlandske, se også V.G. |
| l.i.v. | længde i vandlinien |
| l.o.a. | length over all (længde overalt) |
| l.w.l. | length water line (længde i vandlinien) |
| L/c | Letter of Credit |
| la | Los Angeles, Letter of Authority or Appointment |
| LAFTA | Latin America Free Trade Association |
| LASH | Lighter Aboard Ship, er baseret på, at hele lægtere transporteres ombord i skibet. Dette system er især anvendeligt, hvor for- og eftertransport af ladningen kan foregå med lægtere. f.eks. i bagland med et udviklet flodsystem- og kanalsystem. se også unde |
| lat | Latitude |
| LAT | Latitude |
| lavv. | lavvande |
| laycan | Laydays/cancelling |
| LB | LangBølge |
| lb | libra (pound) |
| lbp | Lenght between perpendiculars |
| lc | Laycan, Last Cargo |
| lcl | Less than full containerload |
| lcl/fcl | More than one shipper/one consignee |
| lcm | Least common multiple |
| LCU | Landing Craft Utility |
| ld | Load |
| ldg | Loading |
| LES | Land Earth Station |
| LF | Low Frequency |
| LF | Low Frequence |
| LFI | long flashing light (langt blink) |
| lg. | længde |
| Lgd. | længde, leading |
| Lgd.Lts | Leading lights |
| lgf. | længdeforandring |
| lh | Lower Hold |
| LHA | Local Hour Angle (lokal timevinkel) |
| Li. | lille |
| LIBA | Lloyds Insurance Brokers Association |
| lifo | Liner In Free Out, Last In First Out |
| Lift ON/Lift Off, LO/LO | Lastning og losning ved hjælp af kraner eller andet løfteudstyr, i modsætning til, at godset køres ombord som Roll On/Roll Off-skibene. |
| LISCO | Lithuanian Shipping Company |
| LIT | Litauen (gl. nationsbogstav) |
| lkg&bkg | Leakage and Breakage |
| LKL | Langeland-Kiel Linien |
| LKT | Lauritzen Kosan Tankers |
| ll | Load Lines, Long Lenghts |
| LLL | Low Location Light, lysstriber langs dørk, skot, bruges ved evakuering af passagere i fly/skibe, se også under IES. |
| LLMC | Limitation of Liability for Maritime Claims |
| LLP | Lloyds of London Press, udgiver Ports of the World (håndbog). |
| LLV | Laveste lavvande |
| LLW | Lower Low water |
| LLW | Lower Low water |
| lmc | Lloyds Machinery Certificate |
| LMS | Laursen Marine Surveyors, dansk firma i Ebeltoft |
| lmt | Local Mean Time |
| LMT | Local mean Time (middelklokkeslettet om bord) |
| LNG | Liquefied Natural Gas |
| LNG Carrier | Liquified Natural Gas Carrier, tankskib til transport af flydende naturgas. |
| LO-LO | Lift On - Lift OFF, Load-On/Load Off |
| loa | Lenght overall, Letter of Appointment. |
| LOF | London Overseas Freightgroup |
| LOF | Lloyds Open Form |
| LOF90 | Lloyds Open Form (bjærgningskontrakt). |
| log. | logvisning, logaritme |
| loh | Loss of hire |
| loi | Letter of Indemnity |
| long | Longitude |
| LOOP | Louisiana Offshore Oil Port |
| LORAN | Long Range Navigation |
| Loran C | langtrækkende (800-2300 sømil) hyperbolsk navigationssystem |
| LOW | Last open water |
| lpg | Liquefied Petroleum Gas |
| LPG | se lpg. |
| LPG-Carrier | Liquified Petroleum Gas-Carrier, tankskib til transport af flydende gas under tryk eller nedkølet eller kombination heraf. |
| LPL | Lauritzen Pacific Line |
| LR | Lloyds Register |
| LR | Lauritzen Reefers |
| LR-Klassen | Betegnelse på B&W-bygget olietankere, Long Range |
| LRC | Certifikat til betjening af maritime MF-, HF- og VHF-anlæg |
| LRF | LodsReguleringsFonden |
| lrg | Large |
| ls, lps | Lumpsum |
| LSC | Live Stock Carrier |
| LSD | Lashed Secured Dunnaged |
| LSM | Lloyds Ship Manager. (britisk tidskrift). |
| LSM | Landing Ship Medium |
| lst | Local Standard Time |
| LT | Liner terms |
| Lt | Light (fyr) |
| lt.v | LightVessel |
| lta | Long Term Agreement |
| ltbends | Liner Terms Both Ends |
| ltge | Lighterage |
| lts | Laytime Saved |
| Lts | Light (fyr) |
| LV. | Lavvande |
| lw | Low water |
| LW | Long Wave |
| LW | Low water |
| lwm | Low Water Mark |
| lwost | Low-water ordinary Spring Tide |
| lwr | Lower |
| LX | Luxembourg (gl. nationsbogstav) |
| LYCN | Laycan = Layday Cancelling Date |
| LYRA | Lyngby Radio |