Trans RINA, Vol 153, Part A1, Intl J Maritime Eng, Jan-Mar 2011 o may result in reduced building conversion costs.
Features: This notation indicates that the service area is restricted to enclosed fjords, lakes or rivers.
Figure 1: a coastel being tugged at Coruna bay. 2.2 CLASSIFICATION
In the past, most of the coastels were classed under the class notation Floating Hotel. For example, if we look up into the Det Norske Veritas (DNV) rules we find the following for this old class notation:
Class notation: Floating Hotel Description: Vessel with accommodation for guests at stationary locations in protected waters.
Application: Passenger ships, mandatory as of July 1995
Remark: Service restriction RE part of main class Date entered into the rules: P Date of last issue: July 1997
Therefore, this class notation is not used since 1997. Flotel 92, as we will see later, is a good example of this old notation. Nowadays, they are just classified as Pontoons, while the hotel or accommodation facilities on the pontoon are built under passenger ship SOLAS regulations, as in the past. Sometimes the hotel part also complies with the civil building rules of the country in which they are intended to operate.
For example, DNV normally classifies coastels as:
Type: 713 – Hotel Barge Notation: 1A1 RE Pontoon
As per DNV rules: Barge:
Ship type class notation for barges or
pontoons without sufficient means for self propulsion for their service area.
Class Notation RE: defines a service area restriction. Purpose: The notation is offered to vessels that are designed for a particular service. The notation is generally applicable to small vessels and normally less than 100 m long.
Benefits:
o adjustment of design loads based on the limited service area.
o retaining the same safety level as for vessels operating without service area
restrictions is retained. A-42 Figure 2: artistic view of Flotel 92.
This hotel was designed as an autonomous unit, for anchoring to the bottom or mooring to a quay in rivers, bays, calm beaches or harbours with a minimum depth of 4 or 5 metres, with access via floating wharves or ramps. The unit
is towed from one point to another when
required, as it has no propulsion, and then anchored/moored. The hotel facilities are built over a steel floating pontoon in which all the machinery required for the autonomous operation is located.
©2011: The Royal Institution of Naval Architects
Therefore, and as will be seen in the classification of offshore flotels, the rules applied to flotels moored to a harbour/quay are not the same as those applied to a flotel barge in open ocean waters. At a first glance, they seem to be similar to Offshore Accommodation Work Barges, but a study of the rules shows that the stability, structural or safety requirements are not so strict, as explained in the previous paragraph by DNV.
While barges and pontoons are the most common
structure for a coastel, cruise vessels are used in some instances for the same purpose, just moored at a quay. In the following paragraphs are shown two examples: Flotel 92, with the old class notation Floating Hotel and used as a commercial hotel; and Jascon 27, used for yard workers accommodation with the new class RE Pontoon.
2.3 COMMERCIAL FLOATING HOTELS
The main use of coastels is as floating hotels. For a better understanding of this use and it technical issues, included here is an example.
2.3 (a) Flotel 92
This is a project of the 1980s from the old Spanish yard ASTANO for a floating hotel with 1000 rooms whose main purpose is to offer provisional accommodation for cities with insufficient hotel capacity when an important event is celebrated. In principle it was considered for events
such as the 1992 Summer Olympic Games celebrated in Barcelona, Spain. or
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