The Panama Canal Authority (ACP) has announced significant changes to its transit reservation system, authorized Neopanamax draft limits and long-term booking arrangements for 2026 and 2027.

These developments are particularly relevant to shipping companies operating bulk carriers, container ships, tankers, LNG/LPG carriers and other commercial vessels trading through the Panama Canal.

With new measures taking effect on 15 October 2026 and additional arrangements scheduled for 2027, shipowners and operators should review their voyage planning, loading conditions and applicable technical requirements.

1. New Panama Canal Transit Rules Effective October 2026

Under ACP Advisory A-36-2026, the number of daily Neopanamax booking slots will increase from nine to ten, effective 15 October 2026.

This brings the total number of available daily transit slots across the Neopanamax and Panamax locks to 33.

The revised reservation arrangements also permit customers to obtain multiple slots for the same booking date and reserve consecutive transit dates, subject to the applicable allocation rules.

However, Panama Canal transit availability remains influenced by vessel type, booking priority, water availability and operational restrictions.

2. Updated Neopanamax Draft Restrictions

The ACP has increased the maximum authorized transit draft for the Neopanamax locks to 14.94 metres (49.0 feet) Tropical Fresh Water (TFW), effective from 28 September 2026 until further notice.

Although the Canal’s general maximum allowable Neopanamax draft is 15.24 metres under suitable water-level conditions, the operational limit can be adjusted according to Gatun Lake levels.

For shipowners, these variations can directly influence:

• Maximum cargo intake and deadweight utilization.
• Loading and ballast conditions.
• Vessel trim and draft calculations.
• Commercial voyage planning and transportation costs.
• The feasibility of using the Panama Canal for particular loading conditions.

For bulk carriers and other heavily loaded vessels, even a relatively small reduction in maximum permissible draft can result in a meaningful loss of cargo-carrying capacity.

Consequently, technical evaluation of allowable transit draft and corresponding cargo intake is essential for efficient vessel operation.

3. New Transit Reservation Arrangements for 2027

Through Advisory A-37-2026, the ACP has introduced its long-term slot allocation arrangements for the 2027 dry season, covering transit dates from 3 January to 3 April 2027.

The programme includes the continuation of the Neopanamax Long-Term Slot Allocation (LoTSA) scheme and the introduction of a new pilot programme for vessels transiting the Panamax locks.

The Neopanamax competition is scheduled for 17 November 2026, while the Panamax pilot competition is scheduled for 24 November 2026.

The new arrangements are intended to improve schedule predictability and provide additional opportunities for operators with recurring or fixed itineraries.

Furthermore, effective 15 October 2026, the late-cancellation surcharge rules will change. The applicable cancellation window is reduced from seven days to four days, while the surcharge remains at 250% of the reservation fee under the specified conditions.

Shipowners should consider these developments when planning their vessels’ commercial employment and transit reservations.

4. Technical Compliance: What Should Shipowners Review?

Apart from operational and booking changes, vessels must continue to comply with the technical requirements established under ACP Notice to Shipping N-1-2026 – Vessel Requirements.

Particular attention should be given to the vessel’s principal dimensions, navigation bridge visibility, air draft, mooring and towing arrangements, equipment certification, and stability conditions.

For vessels undergoing modifications, retrofits or structural alterations, an assessment may be necessary to confirm that the proposed configuration remains suitable for Panama Canal transit.

Technical documentation, calculations and drawings may also be required for ACP review and approval.

These technical requirements are separate from the recently announced booking and draft adjustments and should be evaluated according to each vessel’s characteristics.

5. How GROUP NAVALE Can Support Shipowners and Operators

At GROUP NAVALE, we provide specialized naval architecture and marine engineering services to support shipowners, operators and ship managers in assessing vessel suitability for Panama Canal transit.

Our technical capabilities include:

• Panama Canal Technical Compliance Assessment: Review of vessel arrangements against applicable ACP requirements.
• Draft and Loading Condition Assessment: Evaluation of operating drafts, cargo intake limitations, trim, ballast conditions and stability.
• Mooring and Towing Arrangement Review: Assessment of deck fittings, Safe Working Load (SWL), associated supporting structures and reinforcement requirements.
• Structural Engineering and FEM Analysis: Strength calculations for mooring fittings, deck foundations and other structural modifications.
• Technical Drawings and Documentation: Preparation and revision of General Arrangement, mooring plans, structural drawings and other technical submissions.

Our objective is to help shipping companies identify potential technical limitations, evaluate engineering solutions and prepare vessels for safe and efficient operations, while reducing the risk of avoidable compliance-related delays.

GROUP NAVALE provides independent naval architecture and engineering support to shipping companies worldwide, helping them assess operational restrictions and develop practical technical solutions.

For further information or a technical assessment of your fleet, contact our engineering team.

Based in Piraeus, Greece, our marine engineering office prepares vessel-specific assessments for bulk carriers, tankers, container ships, offshore vessels, passenger ships, ferries, tugboats and yachts.

Vessel-Specific Biofuel Assessment

Every vessel has different machinery, fuel systems and operating requirements. Our biofuel feasibility analysis considers the vessel’s fuel consumption, voyage profile, machinery particulars and available fuel specifications to compare suitable alternatives.

The assessment covers fuel properties, energy-equivalent consumption, machinery compatibility, storage and handling requirements, sustainability documentation and implementation conditions.

CO₂ Emissions and CII Improvement

We evaluate how biofuel use on selected voyages or across annual operations could affect CO₂ emissions accounting and the IMO Carbon Intensity Indicator (CII), where applicable.

Our studies compare the conventional-fuel baseline with proposed biofuel scenarios, showing the potential change in attained CII and annual performance rating under the relevant accounting requirements.

EU ETS and FuelEU Maritime Assessment

GROUP NAVALE assesses the potential impact of marine biofuels on EU Emissions Trading System (EU ETS) allowance requirements and FuelEU Maritime compliance.

The analysis considers voyage scope, fuel certification, greenhouse-gas intensity and compliance costs, giving owners a clear comparison of the proposed fuel options.

Biofuel Costs and Break-Even Analysis

Our marine biofuel economic feasibility studies compare fuel purchase premiums with potential compliance savings. Break-even calculations and sensitivity analysis show how fuel prices, carbon allowance prices and implementation costs influence the result.

Whether you are planning a first biofuel trial, selected-voyage substitution or a fleet decarbonisation strategy, GROUP NAVALE can undertake the feasibility study for your vessel type.

Contact our marine engineering team to discuss a biofuel feasibility study for your ship or fleet.

Please contact us info@groupnavale.gr for more details

1. Maritime Specialization: Our team specializes in naval applications of Computational Fluid Dynamics (CFD). We understand the unique challenges vessels face, from stability to fluid dynamics, and can optimize your system device installations accordingly.
2. Customized Solutions: Every vessel is unique, and so are its requirements. We provide tailored solutions to meet your specific needs, whether you’re equipping a cargo ship, oil tanker, or passenger vessel.
3. Efficiency Enhancement: Our CFD expertise allows us to design system device installations that maximize efficiency, minimize energy consumption, and reduce operational costs, ultimately enhancing your vessel’s performance.
4. Safety First: Safety is a top priority on vessels. We ensure that your system device installations are efficient and compliant with maritime safety regulations to safeguard your crew and the environment.
5. Ongoing Support: Our commitment doesn’t end with installation. We offer continuing support and maintenance services to keep your system devices operating at peak performance, minimizing downtime.
6. EEXI UPGRADE: In case you already installed the ESD we can reproduce the new P-V curves with the efficiency of the ESD. After that, a new EEXI was calculated with a new larger Vref.

According to the new rules that come into force on 01st January 2024 all ships must follow the regulations based on the MSC.1/Circ.1619, MSC.1/Circ.1620 and MSC.1/Circ.1175 Rev1.

• New Ships constructed on or after 2024 must follow the MSC.1/Circ.1619
• Existing ships constructed after 2007 and before 2024 must follow the MSC.1/Circ.1175 Rev1
• All Existing Ships must follow the MSC.1/Circ.1620

More specifically the ships constructed after 2007 and before 2024 must  provide the class with the following details for approval:

• Shall be provided with arrangements, equipment, and fittings of sufficient safe working load to enable the safe conduct of all towing and mooring operations associated with the normal operation of the ship.
• Arrangements, equipment, and fittings shall meet the appropriate requirements of the Administration or an organization recognized by the Administration.
• Each fitting or item of equipment shall be clearly marked with any limitations associated with its safe operation, considering the strength of the supporting ship’s structure and its attachment to it.

For vessels constructed before 2007:

• For vessels with appropriate documentation, records of the original design concept, equipment, arrangement, and specifications are to be submitted for review.
• For vessels without appropriate documentation, owners may establish the Ship Design Minimum Breaking Load (MBLSD) for mooring equipment and fittings based on the Safe Working Load of mooring equipment provided onboard. If no Safe Working Load is specified, then Owners are advised to check the strength of mooring equipment and their supporting structure based on IACS UR A2 and IACS Recommendation No.10 to determine the MBLSD based on the actual capacity of the equipment and their supporting structure onboard
• Towing and Mooring Arrangement Plan: A Technical Specification with procedures for mooring operations, inspections, and maintenance. Procedures to allow the identification and control of mooring lines, tails, and associated attachments when on board are to be documented and available on board.etc

APPLICATION: Ships less than 400 GT or domestic ships may be not applicable at the discretion of the administration. Fuel oil supply systems for all new and existing ships including platforms and drilling rigs (includes all fuel oil supply systems for machinery such as main engines, auxiliary engines, boiler,incinerators, inert gas generators, emergency generators, etc., but excludes low-flash point fuel oil supply systems).

Fuel oil sampling points are required to be fitted or designated for the purpose of taking
representative samples of the fuel oil being used on board the ship, taking into account
MEPC.1/Circ.864/Rev.1.

Our office can undertake to prepare the relevant drawing with the Fuel Oil management plan.

Please contact us info@groupnavale.gr for more details