Mayport Ns (adm David L McDonald Fld) Airport (KNRB), Florida
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Mayport NS (Adm David L McDonald Field), identified as KNRB, is a towered military airfield near Mayport, Florida, with a single paved runway. Civilian activity is limited and governed by prior-permission requirements rather than routine transient use.
Runways
Mayport Ns (adm David L McDonald Fld) Airport has one paved runway, 05/23, 8,001 ft long and 200 ft wide, with an asphalt surface.
Runway geometry from published threshold coordinates. Not for navigation.
Source: FAA Form 5010.
Fuel and airfield services
Mayport Ns (adm David L McDonald Fld) Airport has J5 available on the field. The airport has an operating control tower.
Source: FAA Form 5010 / NASR.
Customs
Mayport Ns (adm David L McDonald Fld) Airport does not clear customs. The nearest port of entry is Jacksonville International (KJAX), 15 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Mayport Ns (adm David L McDonald Fld) Airport recorded 33 business aviation movements in 2025. Traffic peaks in September. Business aviation activity at KNRB is concentrated in April and September, with several months showing no recorded operations.
Business jet movements, FAA TFMSC count. Peak month September, 11 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Mayport Ns (adm David L McDonald Fld) Airport averages 19.5 days above 90°F in July and 2.0 freeze days in January. July is the warmest month, with average highs of 90.4°F, and January the coldest, at 63.9°F.
Weather station is on the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Mayport Ns (adm David L McDonald Fld) Airport has published operating constraints in seven categories: access, weight restrictions, runway notes, emergency arresting systems, noise procedures, pavement strength and other notes.
Caution: light to heavy bird activity occurs on and near the airport. Vessels with masts up to 196 feet are frequently berthed 800 feet left of the runway 23 threshold, and large vessels with masts up to 150 feet frequently transit the adjacent river channel during final approach to runway 23.
Caution: exercise vigilance during runway 05 operations due to extensive controlled and uncontrolled aircraft traffic in the vicinity of Craig Municipal Airport. Pads 1 and 3 have altered lighting and are approved for locally based aircraft only.
Customs, agriculture, and immigration processing is available during airfield hours with a 24-hour prior permission request.
For clearance delivery, contact Jacksonville Approach.
Fire equipment includes a 1500-gallon Stryker unit equipped with a 210-gallon foam tank and 500 pounds of Halon, two 1250-GPM pumpers with 750 gallons of water, one 2000-GPM ARFF apparatus with 500 gallons of water, one advanced life support transport ambulance, one heavy rescue truck with hazmat and technical rescue response capabilities, one hazmat decontamination trailer, one air cart for refilling air bottles, two utility trucks, and one command vehicle.
Traffic pattern: right traffic for runway 23 and left traffic for runway 05. Simultaneous landings and departures between helicopters are conducted on the parallel taxiway located 325 feet from runway 05/23.
Caution: expect simultaneous same-direction operations during dual runway operations.
Arresting hook cable E28(B), located 1200 feet down the runway; 30 minutes notice is required for arrestment unless the field is in divert status.
Arresting hook cable E28(B), located 1186 feet down the runway; 30 minutes notice is required for arrestment unless the field is in divert status.
Noise abatement: Mayport Village and the north bank of the St. Johns River are noise sensitive. No crosswind or base turns are permitted between taxiways Bravo and Foxtrot.
Access is restricted: a 24-hour prior permission request and a civil aircraft landing permit are required. Aircraft with a pavement classification number exceeding 34 require a 72-hour prior permission request through Base Operations. Only participating aircraft are permitted during special local operations.
JASU units on field: 1 NC-8, 1 GTC-85, 1 A/NCPP-105.
Lighting is available during airfield operating hours.
After-hours fuel is not available. Transient helicopter hot refueling requires contacting Base Operations to coordinate refueling times. Fixed-wing hot refueling is not authorized.
A transient or hung ordnance divert alert procedure applies. Organic air-launched weapons safing capability is not available, transient maintenance is not available, and transient parking is limited.
Class D airspace and Class E airspace at 700 feet and below are effective 1200-0400Z (1100-0400Z daylight time), with special local operations 0400-0700Z Monday through Thursday and 1300-2300Z (1200-2200Z daylight time) Friday; closed Saturday, Sunday, and holidays. At other times the airspace is Class G at 700 feet and below. Jacksonville Class E airspace at 700 feet and above is effective continuously.
Ground transportation is not available for aircrew or passengers.
For a civil aircraft landing permit, contact Airfield Management.
Electronic maintenance ground power units: 12 external ground start units, all permanent units located on the H-60 ramp.
Snow removal equipment includes one 15,000-pound forklift.
Source: FAA Chart Supplement.
Nearby airfields
Mayport Ns (adm David L McDonald Fld) Airport has five airfields within 21 NM. The closest is Jacksonville Executive at Craig (KCRG), 5.71 NM southwest.
Part of the Jacksonville area.
Source: Skystar calculation from official coordinates.
Skystar at KNRB
We arrange catering, fuel and trip support here. Supplier prices reach you unchanged; our coordination fee sits on its own line.
The same order, priced two ways.
$600.00 catering order at KNRB.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
The $75 minimum applies below $862.50.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
Is fuel available at KNRB for civilian transient aircraft?
KNRB (Mayport NS, Adm David L McDonald Field) carries only J5 fuel and does not have Jet A on the field. After-hours fuel is not available, and fixed-wing hot refueling is not authorized, so operators should plan fuel stops elsewhere.
What customs process applies for arrivals at Mayport NS?
Mayport NS (KNRB) has no onsite customs of its own; the nearest customs airport is Jacksonville International (KJAX), about 15 nautical miles away. Customs, agriculture, and immigration processing tied to this field is available during airfield hours but requires a 24-hour prior permission request.
What restrictions apply to civil aircraft landing at KNRB?
Civil aircraft landing at KNRB requires a 24-hour prior permission request and a civil aircraft landing permit. Aircraft with a pavement classification number exceeding 34 require a 72-hour prior permission request coordinated through Base Operations.