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MPP-02.3.3
Naval authorities in NATO and HOSTAC-participating nations that configure a ship's Vertical Replenishment Operating Area, and the ship's crew and helicopter pilot who operate within it, under the agreement recorded in STANAG 1162
MPP-02.3.3 sets NATO's minimum requirements for marking, clearances and lighting of a ship's Vertical Replenishment Operating Area for helicopter cargo transfer, and it binds nations through the agreement recorded in STANAG 1162.
MPP-02.3.3 is a NATO Multinational Procedural Publication that fixes the minimum requirements for marking, clearances and lighting of a ship's Vertical Replenishment Operating Area (VOA): the deck space within which a helicopter's rotor, fuselage, landing gear and load clearances are provided for VERTREP, the transfer of material to or from a ship by helicopter. It concerns only loads carried externally by a cargo hook, not cargo carried inside the aircraft. Participating nations agree to mark and light their VOAs as the document specifies, and to fix separately, in the companion publication MPP-02.1, which helicopter categories a given VOA can safely take. The agreement itself is recorded in STANAG 1162, which is also the NSDD cover this record sits under.
It is not a document every NATO nation has taken on in full. The United Kingdom does not implement MPP-02.3.3 at all and uses its own national VERTREP procedures under MPP-02 instead; Italy has not implemented the lighting requirements and authorises daylight VERTREP only; Denmark records that the lighting section cannot be met on ships whose overhead floodlight is not dimmable at ABSL-class; and Estonia implements only the optional Annex F hoist-point marking. A reader checking whether this binds a specific nation's ships needs that nation's own recorded reservation, not an assumption of uniform adoption.
A VOA is the general deck area within which rotor, fuselage, landing gear and load clearances are provided; within it, the pick-up and delivery zone is the unobstructed area where a load is actually transferred. Two obstruction classes govern how tall anything nearby may be: a Class 4 (Low Hover) VOA permits obstructions up to 1.52 m (5 ft) within the fuselage and landing gear clearance zone and 4.6 m (15 ft) within the rotor clearance zone; a Class 5 (High Hover) VOA raises those limits to 4.6 m (15 ft) and 7.62 m (25 ft). Helicopters and VOAs are also classified into four categories by rotor diameter, and a category assigned to a VOA guarantees adequate clearances for every helicopter in that category. A minimum unobstructed deck area of 36 sq m (400 sq ft) is recommended for a major VERTREP operation, though a smaller area is permitted if it is adequate to the ship's own VERTREP requirements.
A load clearance zone of at least 3.1 m (10 ft) in any direction from the centre of the pick-up and delivery zone is recommended, and the load's approach and take-off axis should be kept clear where possible. Outside that, a fuselage and landing gear clearance zone extends port and starboard to the hull edge and forward and aft, sized to the VOA's marking type and capped at the Class 4/5 obstruction heights above. A rotor clearance zone outside that again extends to the hull edge, for a minimum of three-quarters of the largest category helicopter's rotor diameter, capped at the same heights.
Markings are white or yellow over a contrasting background, with the marking's own reflectance at least 0.50 and the background's at most 0.12, so they read clearly by day and can be accentuated by lighting at night. Which of four marking systems applies depends on deck space and helicopter category:
The rotor center limit line itself comes in four types, each tied to a different clearance geometry:
Night operations require dimmable overhead floodlights, white, yellow or red, installed to light the pick-up and delivery zone clearly without putting direct light or glare on the pilot. An additional visual reference is recommended, and the document records which nations use which system: a stabilised horizon bar (Canada, Germany, Denmark, Spain, United States), hangar-face or top floodlighting (Canada, Denmark, Spain), flush-mounted periphery and line-up lights (United States), and unstabilised horizon lights (United Kingdom, Netherlands). The chromaticity of aeronautical lights follows STANAG 3711 unless otherwise specified.
MPP-02.3.3 does not address a supplier or a manufacturer. Its own terms address the participating nations that agree to mark and light their VOAs as specified, in practice whichever national naval authority configures a ship's deck, and, for the optional Annex F marking, the ship's captain and the helicopter pilot who agree between them whether it is safe to use. The agreement to use the publication is recorded in STANAG 1162; a nation is bound once it has taken that agreement on, and several have not, in whole or in part; see the reservations above. Edition A, Version 2 was promulgated in June 2016; the document does not state what edition or version it superseded.
MPP-02.3.3 describes no certification, audit or inspection scheme, and names no accredited body, notified body or government surveillance role. What exists is a set of dimensioned marking, clearance and lighting requirements that a nation's own naval authority would presumably check a VOA's design and fit-out against before clearing it for VERTREP; the document does not say who performs that check or how often. The Record of Reservations and National Comments show the mechanism that actually operates: each nation self-declares whether and how it implements the standard.
NATO publishes MPP-02.3.3 through the NATO Standardization Document Database at no charge. ComplyTrain does not sell it or host a copy; the NSDD listing for MPP-02.3.3 is the source. It is covered by STANAG 1162, the agreement recording nations' commitment to use it.
MPP-02.3.3 is a deck-configuration and flight-safety standard. The work it demands, fixing a VOA's marking, clearance zones and lighting, and checking a specific ship's deck against them, is naval architecture, deck engineering and flight-deck procedure, not something a compliance platform performs.
What ComplyTrain supports is the paperwork trail around that work: holding the design and inspection records that show a VOA was configured to a given category and marking type, the training records for the deck crew who mark and light it, the reservation or exception a nation has recorded against the standard, and the sign-offs and revision history behind them, kept current and ready to produce for a customer or a national authority.
What ComplyTrain does not do: it does not mark, light or inspect a flight deck, and it does not decide which rotor center limit line type or lighting system a nation should fit to its own ships. See where MPP-02.3.3 sits alongside STANAG 1162 and other maritime publications in the standards explorer, and talk to us about the design and inspection record trail behind it.
Tell us how you need to work with MPP-02.3.3 and what you need from it. We will come back to you about what ComplyTrain can do.
Thank you. Your list is on its way to your inbox, and we will come back to you on what working with these standards in ComplyTrain involves, usually within one business day.
Not by itself. MPP-02.3.3 is covered by STANAG 1162, the agreement recording nations' commitment to use it, and several nations have recorded reservations against it, from the United Kingdom's full non-implementation to Italy's daylight-only authorisation. Whether it applies to a specific ship depends on whether the operating nation has taken on the agreement and specifies it in its own naval requirements.
No. Several NATO and partner nations have recorded reservations: the United Kingdom does not implement it and uses its own procedures under MPP-02, Hungary, Slovakia and Slovenia record that they have no forces or means the standard concerns, and Estonia implements only the optional Annex F marking. A reader needs the specific nation's own reservation, not an assumption of uniform adoption.
Both describe how tall an obstruction near a VOA may be. A Class 4 (Low Hover) area permits obstructions up to 1.52 m (5 ft) within the fuselage and landing gear clearance zone and 4.6 m (15 ft) within the rotor clearance zone. A Class 5 (High Hover) area raises those limits to 4.6 m (15 ft) and 7.62 m (25 ft).
No. The document defines VERTREP as the use of a helicopter, and its terms, categories and marking systems are written around helicopter rotor diameters and clearances; it does not address VTOL UAVs.
The document does not say. It sets dimensioned marking, clearance and lighting requirements but names no accredited body, notified body or government surveillance role; checking a specific ship's VOA against them is a matter for whichever national naval authority configures and accepts it.
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