Ask how to protect a tender and the answer is often immediate: “Fit AIS or a tracker,” which masks a fundamental misunderstanding. It can take years for an industry to move beyond habit language. A tracker suggests periodic location reporting, often cellular. What ocean towing needs is secure, continuous monitoring over a dedicated communications link that functions remotely, independent of coastal infrastructure (which is stipulated by insurers for away from shore towing) — with preemptive information on bilge, battery, pitch, roll and distance between the two. These are the parameters that can warn if you about to lose your asset and give you time to react.
AIS was designed to broadcast position and collision avoidance warnings, not to provide asset protection. During towing operations, the MCA generally discourages AIS transmission from the towed vessel because it can generate misleading collision alerts for surrounding traffic. In practice, AIS is frequently disabled during long tows. When that happens, position visibility disappears entirely.
But even when active, AIS or a tracker provides location not condition. It cannot report water ingress, voltage instability, abnormal heel angles, separation (from two moving yachts) or driveline stress.
Tenders and chase boats are no longer simple shore-transfer craft. Many are complex, high-powered, inboard vessels. Increasingly, they are towed across major passages rather than shipped separately, introducing sustained cyclical loading, vibration exposure, and mechanical fatigue over thousands of miles. Yachts are visiting more places with expeditions being the trend along with unpredictable weather.
Insurers, understandably, are cautious. However, experienced captains are not avoiding long-distance towing; they are engineering it more rigorously with heightened caution.
The physical towing architecture forms the first layer of risk control. Specialist Jack Hutchinson of Tender Tow in Fort Lauderdale, distinguishes clearly between coastal and trans-ocean rigs. Coastal setups favor convenience and ease of handling; ocean rigs are engineered for endurance, redundancy, and controlled energy absorption under sustained cyclical loading.
A critical feature is the use of static Dyneema chafe tails at vessel attachment points. Nylon bridle legs can stretch under load through hawse holes or across fairleads, movement becomes abrasion. In heavy seas, even polished stainless can cut through nylon within 24 hours. Static HMPE (Dyneema) tails eliminate stretch at the contact surface, significantly reducing wear. The elastic nylon section is positioned further aft, where it can absorb dynamic shock loads without bearing against deck hardware.
Hybrid ocean configurations typically use a 45–50 meter Dyneema main hawser with 20–30 meter nylon bridle legs. Polyester is generally avoided because its limited stretch increases shock loads in rough conditions. Offshore hardware is also upgraded: reinforced tubular thimbles and bolt-type safety shackles replace lightweight fittings to prevent deformation and loosening under repeated load cycles. Carrying comprehensive spares is essential.
This mechanical discipline manages external forces. The second layer of protection is internal and separation monitoring.
People often say that inboard tenders shouldn’t be towed due to shaft freewheeling, lubrication starvation, vibration harmonics, and cumulative driveline fatigue. Those concerns are valid. However, a recent 4,000-nautical-mile Pacific crossing demonstrated that such towing can be executed successfully.
Our shared client recently towed a Viking 48ft yacht across the Pacific using a reinforced ocean rig combined with our advanced monitoring system. In addition to bilge, battery and distance oversight, a bespoke prop shaft monitor was configured and integrated. Continuous shaft behavior data allowed the crew to observe rotational characteristics and detect abnormal resistance or vibration patterns early. Rather than relying solely on pre-departure mechanical confidence and occasional visual, the crew maintained live mechanical awareness throughout the passage.
The crossing was completed without incident. Chief Engineer Jonathan Block kept a watchful eye over the monitoring system and fed back any details with videos. The lesson was not that inboard towing carries no risk, but that risk can be quantified and managed when physical architecture and monitoring operate together.
The future of tender protection lies not in passive tracking, but in integrated mechanical and environmental oversight delivered over resilient communications infrastructure. As tenders continue to increase in size and value, and weather systems become more inaccurate to predict, protection strategies must evolve with equal technical precision.