Introduction: Why Pilotage and Towage Shape Your Indonesian Port Call
For ship operators calling at Indonesia, pilot and tug services are often treated as a technical detail arranged in the final hours before berthing. In practice, pilotage and towage are among the most decisive elements of navigational safety, berthing schedules, and total port call cost. A delayed pilot or an unavailable tug can leave a vessel waiting at anchorage, push back cargo operations, and trigger avoidable additional charges.
Indonesia has hundreds of ports, and their approach channels differ enormously. The approach to Tanjung Priok is relatively open but heavily trafficked, Tanjung Perak in Surabaya has a long and narrow channel through the Madura Strait, and Belawan in Medan and Pontianak involve river channels affected by siltation and tides. As a result, pilotage rules in Indonesia are not uniform: there are compulsory pilotage waters and voluntary (extraordinary) pilotage waters, each with its own request procedures and tariff rules.
This article explains the legal basis for pilotage and towage in Indonesia, the difference between compulsory and extraordinary pilotage, how to request services through a ship agent, what drives the number of tugs required, and practical tips to avoid losing your berthing slot. It is written from the perspective of a ship agent coordinating arrivals and departures at Indonesia's main ports every day, so that you can plan your port call with greater accuracy.
Legal Basis for Pilotage and Towage in Indonesia
The legal framework for pilotage in Indonesia is rooted in Law No. 17 of 2008 on Shipping, which defines pilotage as the activity of a pilot assisting, advising, and informing the master about local waters, so that navigation remains safe, orderly, and smooth. Technical details are set out in government regulations on navigation and waterborne transport, as well as in Ministry of Transportation regulations on pilotage and towage and their amendments. On the ground, implementation is coordinated by the Directorate General of Sea Transportation through the Harbour Master and Port Authority offices (KSOP).
It is important to understand that a pilot does not replace the master. Under the internationally accepted principle that also applies in Indonesia, the master retains overall responsibility for the safety of the ship while the pilot is on the bridge. The pilot acts as a local adviser who knows the channel, currents, depths, and traffic. For this reason, a master-pilot information exchange is the first step as soon as the pilot boards, covering the berthing plan, speed, tug positions, and contingency plans.
Internationally, pilot transfer safety follows SOLAS Chapter V Regulation 23 and related IMO guidance on pilot ladders and associated equipment. Non-compliant pilot ladders are among the most common deficiencies found during inspections. Vessels heading to Indonesia should confirm that the pilot ladder, combination arrangement, lighting, and lifebuoy at the embarkation point are in good order, as also stressed in our guide to Port State Control in Indonesia.
Compulsory Pilotage Waters and Extraordinary Pilotage
Compulsory pilotage waters are waters where, because of channel conditions, traffic density, and navigational risk, vessels of certain sizes or types must use a pilot. These waters are designated by the government on safety grounds and usually cover the approaches to major ports. Vessels transiting these waters must notify and request pilot services before entering, and non-compliance can lead to administrative sanctions or findings by the harbour master.
There is also the concept of extraordinary pilotage, which can be provided in waters not designated as compulsory. It is typically used when the master or operator feels additional support is needed, for example during bad weather, with very large vessels, with degraded engine or steering performance, or when the master is unfamiliar with the local channel. The request is voluntary but still follows the official port procedure, and tariffs follow the applicable rules.
Certain exemptions or facilities exist, for instance for Indonesian-flagged vessels whose masters hold a pilotage exemption certificate for a specific port. Foreign vessels, however, do not automatically benefit from such arrangements. The best practice is to treat every international port call as one that requires a pilot, unless your agent has confirmed otherwise in writing based on local regulations and the recommendation of the harbour master.
How to Request Pilot and Tug Services Through Your Ship Agent
Pilot and tug requests are normally submitted by the ship agent as part of the arrival process. Before the vessel arrives, the agent sends the arrival notification and submits the vessel service request through the port's integrated service system, together with the documents also required for PKKA services. Typical data includes vessel name, IMO number, flag, GRT, LOA, draft, cargo type, ETA, and the planned berth and operation.
Once the request is accepted, the pilotage provider schedules the pilot and pilot boat according to channel readiness and the vessel queue. On the day of arrival, the vessel is asked to contact the port or pilot station by VHF on the designated channel several hours before reaching the pilot station. The agent monitors movements, updates the ETA, and ensures the pilot and tugs are ready at the right time. Late ETA updates are a common reason for pilots waiting or vessels being delayed.
After berthing, the pilot and tugs are released, and the agent prepares the service documents for billing. When the vessel departs, the same cycle repeats for unberthing and channel exit. Consistent data and clear communication between the vessel, agent, and port are therefore essential. Operators working with an experienced agent usually receive schedule confirmation faster and avoid slot conflicts, especially during peak hours or when the port is congested.
Towage: Number of Tugs, Bollard Pull, and Key Factors
Towage is the use of tugboats to assist vessel manoeuvring during berthing, unberthing, and turning in the port basin. The number of tugs needed is not arbitrary. The main factors include vessel length and displacement, draft, windage area, vessel type, current strength, weather conditions, and berth characteristics. Large container ships and car carriers with high windage typically need more tug support than small general cargo vessels.
The tug specification most often discussed is bollard pull, the maximum static pulling force a tug can generate. Ports usually have internal guidelines for the combination of tug numbers and capacities for particular vessel size ranges. Operators should not assume that the combination used at one port applies at another, since Tanjung Priok, Tanjung Perak, and Balikpapan differ in berth layout, currents, and tug fleet. Confirming with your agent before arrival is the safest approach.
Special conditions also affect tug requirements, such as vessels without a bow thruster, vessels with machinery defects, or vessels carrying dangerous cargo. In emergencies such as a blackout or steering failure, the availability of an emergency tug can decide whether an incident stays minor or escalates into a major loss. A contingency plan and fast communication with the ship agent and port authority should therefore be prepared before the vessel enters Indonesian waters.
How Pilotage and Towage Affect Port Call Costs
Pilotage and towage charges are a significant component of the Proforma Disbursement Account (PDA). Pilotage tariffs are generally linked to vessel size (GRT) and the number of movements, while towage tariffs depend on the number of tugs, duration, and tug capacity. Beyond base tariffs, there may be extra charges such as waiting time, short-notice cancellation, or service outside normal hours, depending on provider and port rules.
To control costs, operators should ask for a PDA that itemises pilotage and towage per movement rather than a single lump sum. This makes it easier to compare ports and adjust if the operating plan changes. Local coordination can also be supported through our maritime logistics services and support services.
Good schedule planning also reduces hidden costs. A vessel that arrives on its ETA and reports changes early will find it easier to secure a pilot and tug slot. By contrast, vessels arriving early or late without notice may be rescheduled. For vessels also conducting a crew change, berthing time should be synchronised with seafarer movements through our crew change services so that quay operations and crew transfers do not clash.
Practical Tips for Smooth Pilotage and Towage
First, send an accurate ETA and update it regularly to your agent, ideally at 72, 48, and 24 hours before arrival and whenever speed or weather changes. Second, make sure vessel data such as LOA, draft, and manoeuvring equipment status is correct and current, because wrong information can lead to unsuitable tug assignments. Third, check that the pilot ladder and embarkation arrangements on the designated side are ready, with adequate lighting for night operations.
Fourth, run a structured master-pilot exchange using a passage plan that already covers the berthing plan, tug positions, and decision points. Fifth, keep VHF monitoring active on the designated channel and make sure the watchkeeping officers understand reporting procedures. Sixth, inform your agent immediately about any equipment defect, because adjusting tug numbers and schedules is easiest when information is shared early.
Seventh, consider local conditions. In Surabaya and Belawan, tides and channel depth strongly affect the entry window. In Balikpapan and Samarinda, river currents and barge traffic call for extra vigilance. In Pontianak, channel siltation affects maximum draft. Understanding these characteristics helps operators plan arrivals within the best window and avoid unnecessary waiting.
FAQ
Q: Must all foreign vessels use a pilot at Indonesian ports?
A: In general, foreign vessels entering compulsory pilotage waters must use a pilot. Detailed requirements depend on the designation of the waters and local rules, so written confirmation from your ship agent before arrival is strongly recommended.
Q: Who is responsible if an incident occurs while the pilot is on board?
A: As a basic principle, the master remains responsible for the safety of the ship even with a pilot on the bridge. The pilot acts as a local adviser, so the master should actively monitor and may question or decline advice judged to be unsafe.
Q: How is the number of tugs determined?
A: It depends on vessel size and type, draft, windage, current and weather conditions, and berth characteristics. Your ship agent confirms requirements with the towage provider based on the vessel data you send before arrival.
Q: Are pilot and tug services included in agency fees?
A: No. Pilotage and towage are port charges billed at the provider's tariff, while the agency fee covers the agent's coordination services. They are normally itemised separately in the PDA and Final Disbursement Account.
Conclusion
Pilotage and towage are core to the safety and efficiency of every call at an Indonesian port. Understanding the legal basis, the difference between compulsory and extraordinary pilotage, the request procedure, and the factors behind tug requirements helps operators plan more accurate and cost-effective port calls. The keys are accurate vessel data, updated ETAs, and close coordination with an experienced ship agent at the destination port.
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